问题

13. They were surprised that a child ______ work out the problem while they themselves couldn’t.

A:should
B:would
C:could
D:might

正确答案是：

同类题型

It’s _____ my classmates.

Only in this way _________ make progress in our English study.

I hope the winter vacation will come soon. — . It’s really relaxing.

What ________ the number of the students in your school –About two thousand. A number of them_________ from England.

There is with my computer, so I can’t finish the work on time today.