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．must
B．should
C．must have
D．should have
答案
答案：C
“你猜到了吗？我的论文得了A”“太好了，你一定进行了大量阅读而且投入了许多工作。” 根据语境I have got A for my term paper.可知“已经拿到了好成绩”是过去的事情，对过去的推测用must have done。故选C