Question

【题目】【2015·陕西】Mary really hard on his book and thinks he’ll have finished it by Friday.

A.worked B.has been working C.had worked D.has worked

Answer 1

【答案】B

【解析】

试题分析：句意：Marty一直努力写书，我想他到周五为止将已经完成了。用现在完成进行时表示从过去到现在一直进行的动作。所以选B。