You can make a complaint to the local government ____you are happy with the way things are.
A．unlessB．ifC．onceD．a(chǎn)s
A

試題分析：此處unless除非…… ；if 如果； once 一旦；as 當……。句意：你可以抱怨當?shù)卣悄銓κ虑榈奶幚矸绞綕M意。根據(jù)選A。
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