问题

I don’t know how to do it well.—Don’t worry. Here are some ________.
A:when
B:after
C:until
D:while;
B:after
C:until
D:while;
正确答案是:
同类题型
The most important words in this sentence have been ______, so it doesn’t make any sense.
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My sister met him at the Grand Theatre yesterday afternoon,so he ________ your lecture.
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