Also in 2024 Test B English, question 13; 2026 Practice Test D English, question 44.
Passage Moving through Mountains
Moving through Mountains
(1) An age-old proverb says that necessity is the mother of invention. (2) Centuries of human ingenuity in the face of obstacles prove this to be true. (3) For many years the Swiss Alps, a mountain range spanning southern Switzerland and northern Italy, were such an obstacle. (4) Roads and railways had to navigate around the mountains or through winding tunnels inside the mountains, making the transportation of people and goods difficult and time consuming. (5) In 2016 these burdens were eased with the completion of the Gotthard Base Tunnel.
(6) Construction of the high-speed railway tunnel began in 1996. (7) The tunnel was created through the use of tunnel-boring machines, which are giant drills with a flat rotating head called a cutter head. (8) Each of the tunnel-boring machines used during the construction of the tunnel was about the length of four football fields arranged end-to-end. (9) During the seventeen-year construction period, 28 million tons of rock were removed, enough to rebuild the Great Pyramid of Giza five times. (10) This massive construction project is reported to have cost $12 billion. (11) After that, 4 million cubic meters of concrete, or enough concrete to build eighty-four Empire State Buildings, were used to construct and support the tunnel.
(12) By 2020 the high-speed railway will carry more than 250 freight trains and 55 passenger trains a day, with most traveling at speeds of around 100 to 125 miles per hour. (13) It will be faster for people to travel between northern and southern Europe. (14) The travel time between the European cities of Zurich, Switzerland, and Milan, Italy, will be reduced by an hour. (15) Many European leaders compare the Gotthard Base Tunnel to the Channel Tunnel, a 33-mile underwater tunnel that connects the United Kingdom and France. (16) While there is no roadway in the Channel Tunnel, people can drive their cars onto special trains that will carry vehicles through to the other side.
(17) Just as traffic congestion in major cities led to the construction of underground local transportation, natural formations, such as mountain ranges, have also sent people underground for faster, easier, and cheaper methods of transportation across larger areas. (18) There is renewed interest in constructing innovative methods of transportation that will help eliminate problems associated with traveling to and from certain areas.
Question
Which sentence presents information that shifts away from the main topic of the third paragraph (sentences 12–16) and should be removed?
- Asentence 13
- Bsentence 14
- Csentence 15
- Dsentence 16
Show the answer
Correct answer: D
The answer is (D)
The question asks which sentence should be removed because it presents an idea that shifts away from the main idea of the third paragraph, which is about the transportation benefits of the Gotthard Base Tunnel.
Option D (sentence 16) is the correct response because, even though the sentence provides additional information about the Channel Tunnel, it does not help the reader understand the benefits of the Gotthard Base Tunnel, so it should be removed.
Option A (sentence 13) is incorrect because the idea of faster travel times is important to the development of the main idea of the paragraph.
Option B (sentence 14) is incorrect because the sentence provides a specific example of decreased travel time between two cities when traveling through the Gotthard Base Tunnel, supporting the development of ideas in the paragraph.
Option C (sentence 15) is incorrect because the sentence compares the Gotthard Base Tunnel to another tunnel that provides an important connection between places, and the sentence supports the idea that transportation innovations are beneficial.
Question analysis
This revising question looks at the paragraph describing what the Gotthard Base Tunnel will do for travel in Europe and asks which sentence shifts away from that topic and should be removed. Every sentence is related to tunnels and travel, so students must judge which one no longer serves the paragraph's main point.
- NYS standards
- 7W2b developing a topic
- Grade level
- Grade 6 reading and task
- Compared with grade 7
- Below grade 7 Cutting a sentence that strays from a paragraph's focus is practiced from grade 6. The paragraph is five sentences of plain facts with one clear topic, so this asks less than a typical grade 7 revision task.
- Estimated difficulty
- Straightforward: two steps or one careful reading.
- Thinking it demands
- Depth of knowledge 2, skills and concepts · mainly analyze
- What makes it hard
- A very close wrong answer moderate
- How sentences fit together minor
- Evidence
- Answered from one paragraph or stanza
- Reading level
- Passage: about grade 11, 362 words; question and choices: about grade 6, 24 words.
- Students, last 30 days
- Not enough answers yet to show (it takes 10).
Why it is hard, traps and wrong answers (shows the answer)
Why it is hard
The paragraph drifts gradually, which makes this harder than a plain hunt for the odd sentence out. The Channel Tunnel arrives in sentence 15 as a comparison that still concerns the Gotthard tunnel's importance, and only the next sentence leaves the Gotthard tunnel behind entirely. Students who cut at the first mention of the other tunnel lose the point, so it pays to ask which sentence says nothing about the Gotthard tunnel or the travel it speeds up.
A very close wrong answer moderate Choosing the answer
Sentence 15 is the first to mention the Channel Tunnel, so it looks like the shift, but it still compares that tunnel with the Gotthard; sentence 16 is wholly about car trains under the Channel. (Embretson & Wetzel, 1987; Gorin & Embretson, 2006; Ascalon et al., 2007)
How sentences fit together minor Working it out
The paragraph's focus, the faster travel the Gotthard tunnel will bring, has to be held while each of sentences 13 through 16 is tested against it. (Halliday & Hasan, 1976)
Strategy: State the paragraph's topic in a few words, then check each listed sentence against it. The sentence to cut is the one that talks about something other than that topic.
The wrong answers, classified
A Fixes what isn't broken (Connors & Lunsford, 1988)
Cuts sentence 13 as a vague restatement, but “It will be faster for people to travel between northern and southern Europe” is the paragraph's central claim.
B Fixes what isn't broken (Connors & Lunsford, 1988)
Treats the Zurich-to-Milan example as a side detail, though the hour saved between those cities is concrete proof of the faster travel the paragraph promises.
C Fixes what isn't broken (Connors & Lunsford, 1988)
Rightly senses the Channel Tunnel is a detour but cuts the comparison that still concerns the Gotthard tunnel, leaving in sentence 16, which is only about car-carrying trains.
Working it out, step by step
Figure out what the question asks
Every sentence in a paragraph should support its main topic. One sentence in paragraph 3 drifts to a different topic. You need to find it so it can be cut.
Find the paragraph’s main topic
Paragraph 3 is sentences 12 to 16. Sentence 12 says the railway will carry many trains at high speeds. Sentence 13 says: “It will be faster for people to travel between northern and southern Europe.” So the topic is how the Gotthard Base Tunnel will make travel faster.
Test each sentence against the topic
- Sentence 13 states the topic: faster travel.
- Sentence 14 gives an example. The trip between Zurich and Milan will be an hour shorter.
- Sentence 15 compares the Gotthard Base Tunnel to the Channel Tunnel. It still talks about the Gotthard tunnel.
- Sentence 16 says “people can drive their cars onto special trains” in the Channel Tunnel. It says nothing about the Gotthard tunnel.
Watch for the trap
Watch out: Sentence 15 is the first to name the Channel Tunnel. So it can look like the place where the paragraph shifts. But it compares that tunnel with the Gotthard tunnel. That keeps it tied to the topic. Sentence 16 leaves the Gotthard tunnel behind completely.
Pick the answer
Sentence 16 is only about car trains in the Channel Tunnel. So the answer is D, sentence 16.
Why this answer and not the closest wrong one
Choice C, sentence 15, is the closest wrong answer, since it brings in the Channel Tunnel. But it still talks about the Gotthard Base Tunnel by comparing the two. Sentence 16 talks only about the Channel Tunnel, so it is the one that shifts away.
More questions like this
The original DOE question

The passage “Moving through Mountains” as printed (page 48)
