问题
选择题
—How did you do on the test?
—Not so well. I ______much better, but I misread the directions for Part One.
A．could
B．could have done
C．must have done
D．should do
答案
答案：B
这题考查情态动词的虚拟语气，could have done“本可以做…却没有”，句意是：--你考试怎样？--不是很好，我本可以更好，但是我误解了第一部分的说明。