Question

【题目】--Do you enjoy a volunteer?

--If you want this，you’d better join us．

A. being，knowing B. to be，knowing

C. being，to know D. to be，to know

Answer 1

【答案】C

【解析】句意：——你喜欢当一名志愿者吗？——如果你想要知道这个，你最好加入我们。enjoy doing sth．喜欢做某事，want to do sth．想要做某事，故选C。