The volunteers try to convince people the fact that some species are in danger of .A. for

问题补充：

The volunteers try to convince people the fact that some species are in danger of .

A. for; dying away

B. about; dying down

C. of; dying out

D. on; dying off

答案：

A. for; dying away

B. about; dying down

(答案→)C. of; dying out

D. on; dying off

解析：第一空考查短语“是某人信服某事”convince sb of sth;第二空辨析短语die down 平息，die out 灭绝，die off 一个接一个死。句意：志愿者试图使人们相信有些物种处于灭绝的危险中。选C