问题

It’s quite a time _____Liu Xiang was injured in the foot, but we’re sure it won’t be long _____he returns tothe track[ ]
A: after; when
B: before; since
C: that; when
D: since; before
B: before; since
C: that; when
D: since; before
正确答案是:
同类题型
you make a pumpkin lantern— No, I .
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