Multiple choice

Directions: The underlined part the following sentence may have an error of grammar or syntax. The part has been rewritten in options (B) to (E) in four different ways - (A) being an exact restatement of the underlined part. Pick up the option (B) or (C) or (D) or (E) that corrects the error in the underlined part, if any. If there is no error, mark (A).

Tiny quantities of more than thirty rare gases, most of them industrial by-products, threaten to warm the Earth's atmosphere even more rapidly than carbon dioxide during the next fifty years.

  1. to warm the Earth's atmosphere even more rapidly than carbon dioxide during the next fifty years

  2. to warm the Earth's atmosphere even more rapidly over the next fifty years than carbon dioxide will

  3. during the next fifty years to warm the Earth's atmosphere even more rapidly than carbon dioxide

  4. a warming of the Earth's atmosphere during the next fifty years even more rapid than carbon dioxide's

  5. a warming of the Earth's atmosphere even more rapid than carbon dioxide's will be over the next fifty years
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The comparison is between warming created by rare gases and that generated by carbon dioxide. (A), (C) and (D) and (E) all compare the warming to carbon dioxide as a gas and not its effects. Answer: (B)

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