The machine will continue to make much noise ______ we have it repaired.

admin2008-10-15  40

问题 The machine will continue to make much noise ______ we have it repaired.

选项 A、when
B、because
C、if
D、unless

答案D

解析 unless意为“除非、如果不”,位于句中引导状语从句,而其他三个连词均不符合题意。
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