【单选题】【消耗次数:1】
5. I went to the doctor’s yesterday. I had to wait for half an hour before he _____ see me.
can
may
might
could
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【单选题】 I went to the doctor’s yesterday. I had to wait for half an hour before he ___ see me.
①  ?can
②  ?may
③  ?might
④  ?could
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