题目内容
--- Why! I ________ get you on the phone.
--- We ________ basketball on the playground when you phoned.
[ ]
A.didn't; must be playing
B.couldn't; must be playing
C.couldn't; must have played
D.didn't; must have been playing
答案:D
解析:
解析:
第一句表述过去的真实情况,故用一般过去时;第二句表示就过去某时正发生的动作进行肯定推测,故用 must have been doing。 |
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