问题
May I go out to play soccer ball—I’m afraid not. You can’t play __ you have finishedyour homework.
A:after
B:when
C:of…的
D:unless
B:when
C:of…的
D:unless
正确答案是：
同类题型
There have been several new events______the program for 2012 long Olympic Games
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I don’t know your e-mail address. Could you please_______here—Sure.