问题
______ is often the case in science, there is no simple answer
A:That
B:As
C:When
D:Where
B:As
C:When
D:Where
正确答案是：
同类题型
Would you take this along to the office for me—______________.
He was_____weak_____ he couldn’t stand up
I thought he made this mistake ________ in his job because he wanted to make his manager angry.
Would you mind if I smoked here?—I am afraid…, but if you________.
Must I go there right now, mum—No, you ____. You can go there tomorrow.