问题补充:
—Guess what! I have got A for my term paper.
—Great! You read widely and put a lot of work into it.
A. must
B. should
C. must have
D. should have
答案:
A. must
B. should
(答案→)C. must have
D. should have
解析:考查虚拟语气。句意:你猜怎么着?我的学期论文得了个A。——太棒了。你一定广泛的阅读了,并且投入了很多工作吧!“must+have+done”表示对过去事情的肯定推测,译成“一定做过某事”,本题中read是过去分词,故选C。