Question

【题目】 Animals are our good friends. We are supposed ________ them.

A. to protect B. protect

C. protecting D. protected

Answer 1

【答案】A

【解析】

试题分析：句意：动物是我们的好朋友。我们应该保护他们。A. to protect动词不定式形式；B. protect动词原形；C. protecting动词的现在分词形式；D. protected动词的过去式。be supposed to do sth,应该做某事，结合选项的形式，故选A。