More attention must be paid the endangered animals..A. to protectingB. protect C. to prot

问题补充：

More attention must be paid the endangered animals..

A. to protecting

B. protect

C. to protect

D. protecting

答案：

(答案→)A. to protecting

B. protect

C. to protect

D. protecting

解析：句意：应当适当注意保护频临灭绝的动物。这里是pay attention to+doing，这里是这个短语的被动形式，to不能省略，故选A。