问题

Liu Xiang has failed over and over again in the past years. And that’s _________ he succeeds.
A:what
B:when
C:why
D:where
B:when
C:why
D:where
正确答案是:
同类题型
Can I ______your dictionary?—Sorry,I’m using it.
_____pencil cases do you have? —One. []
I felt very __________ when I was having classes this morning.—Did you stay up very late last night?
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He was late this morning, because the bus was too ________ for him to get on.