The decision about such a big project can not be made ______ each member of the

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问题 The decision about such a big project can not be made ______ each member of the board agrees.

选项 A、if
B、unless
C、though
D、as

答案 B

解析 本题考查状语从旬连词的用法。根据空格处前后的句义可以判断,此处需要一个引导条件状语从句的连词,从句是条件,主句是结果。在四个选项中,选项A和选项B都可用于引导条件状语从句,选项B的unless等同于if...not,与选项A的意思刚好相反,适合本句句义。故答案为B。
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