TMark the letter A,...

Câu hỏi: TMark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions

A. Nothing is done and tigers are in danger of extinction

B. Tigers would have become extinct if nothing had been done

C. Tigers will become extinct unless something is done quickly

D. Although something must be done quickly, tigers are in danger of extinction