Government cannot operate effectively ___________ it is free from such interference.

2023-08-07

A.so long as
B.so that
C.unless
D.because


参考答案:C

考查连词辨析。句意为“除非政府摆脱这种干扰,否则就不能有效运作”。unless意为“除非;如果不”,相当于if…not,引导条件状语从句。其他三项,so long as“只要”,so that“因此;以至于;以便”, because“因为,由于”,均不符合题意。故选C。

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