Question

【题目】 Ann is said ________ research in Africa, and she will come back next month.

A. to do B. to be doing

C. to have done D. done

Answer 1

【答案】C

【解析】考查不定式作主语补足语。Sb be said to do/to be doing/to have done；…to do表示一般性动作；to be doing表示动作的正在进行；to have done表示动作的已经完成。句意：据说安已经在非洲完成了研究，并且她下个月就回来了。故选C。