______they invite you to speak, remain silent.

admin2014-03-31  20

问题 ______they invite you to speak, remain silent.

选项 A、Even though
B、Though
C、If
D、Unless

答案D

解析 本题考查连词的用法。根据句意,被邀请发言和保持沉默是不一致的,所以选择unless(除非),相当于“if...not...”选项D为正确答案。
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