Answer: C. connect

Detailed reasoning: The phrase “from one place to another” indicates linking destinations. Aeroplanes help people travel between places, so they “connect” one place to another. The other options mostly mean splitting or making separate, which contradicts the intended meaning.

Option-by-option analysis:

A. disjoin → Means separate; opposite of the idea of linking travel routes.

B. part → Not natural as a verb here; does not mean linking places.

C. connect → Correct; matches the idea of linking places for travel.

D. separate → Opposite meaning.

E. divide → Opposite meaning.

LaTeX note (required symbols): “Connect” is \( \gt \) “separate” in matching the sentence meaning.

Answer: B. flies

Detailed reasoning: Concorde is an airliner; the correct verb describing what it does at a certain height is “flies.” “Drives” is for vehicles on roads, and “jumps” is incorrect. “Goes/comes” are too general and do not match the aviation context as precisely.

Option-by-option analysis:

A. goes → Too general; does not specifically describe air travel.

B. flies → Correct and specific to aircraft movement in the air.

C. jumps → Incorrect action for an airplane.

D. drives → Incorrect; airplanes do not “drive” at cruising altitude.

E. comes → Too general and direction-focused; not appropriate here.

LaTeX note (required symbols): “Flies” is \( \gt \) “goes” for precision in an aviation sentence.

Answer: D. reaches

Detailed reasoning: The phrase “... a speed of over 2000 km per hour” describes achieving a certain speed. The natural collocation is “reaches a speed.” “Moves a speed” is ungrammatical, and other options do not fit the meaning.

Option-by-option analysis:

A. cuts → Does not collocate with “a speed” in standard usage.

B. continues → Needs an object like “to fly”; does not fit “a speed.”

C. moves → Must be “moves at a speed,” not “moves a speed.”

D. reaches → Correct collocation: “reaches a speed of ...”

E. limits → Wrong meaning and structure.

LaTeX note (required symbols): Supersonic speed \( \gt \) ordinary airliner speed in this description.

Answer: B. undesirable

Detailed reasoning: If pollutants are dangerous, they are not wanted. “Undesirable” means not desired or not wanted, which fits logically. The other options do not match the cause-effect meaning (“because they are dangerous”).

Option-by-option analysis:

A. unavailable → Means not obtainable; danger does not necessarily make something unavailable.

B. undesirable → Correct; dangerous things are generally not wanted.

C. unchangeable → Means cannot be changed; unrelated.

D. unsuitable → Could mean not appropriate, but “undesirable” is the more direct result of being dangerous.

E. unavoidable → Means cannot be avoided; opposite direction from “dangerous therefore ...”.

LaTeX note (required symbols): Danger level is \( \gt \) acceptability, so pollutants are “undesirable.”

Answer: E. replacing

Detailed reasoning: The structure “consider ... cigarettes with carrots” implies substitution. The only option that means “substituting” is “replacing.” Other options do not fit grammatically or logically with “with carrots.”

Option-by-option analysis:

A. finding → You do not “find cigarettes with carrots” in this structure.

B. knowing → Does not fit with “with carrots.”

C. searching → Wrong meaning and structure.

D. recognizing → Wrong meaning and structure.

E. replacing → Correct: “replacing cigarettes with carrots.”

LaTeX note (required symbols): Health benefit of carrots is intended to be \( \gt \) the harm of cigarettes in this suggestion.