2. 外语
  3. I had to wait for half an hour before he______see me.

I had to wait for half an hour before he______see me.

admin2015-09-30  32
问题 I had to wait for half an hour before he______see me.
选项 A、can
B、may
C、might
D、could
答案D
解析 have to(must)…before…can…“必须……才”，是一个句型。此句是过去时，所以用could。might“也许”，口气太弱，与句义不符。
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