问题
选择题
—Guess what ! I have got A for my term paper .
—Great ! You ________ read widely and put a lot of work into it .
A．should
B．should have
C．must
D．must have
答案
答案：D
考查情态动词， must have done 表是对过去事情肯定的推测，句意：猜怎么了？我在这学期的考试中得了A，太棒了！你一定大量的阅读为考试投入了大量的工作，故选D。