问题:
The question that puzzles them is ___they can finish the work on time.
A.what it is that
B.what is it that
C.how is it that
D.how it is that
The question that puzzles them is ___they can finish the work on time.
A.what it is that | B.what is it that | C.how is it that | D.how it is that |
参考答案: