The meeting had been on for half an hour Miss Yang turned up.A. whileB. AsC. UnlessD. be

发布时间：2020-08-17 13:56:08

The meeting had been on for half an hour      Miss Yang turned up.
A. while
B. As
C. Unless
D. before

网友回答

A. while
B. As
C. Unless
(答案→)D. before
解析：考查从句中连词的选择。此处有“在—之前”。
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