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She says that she’ll have to close the shop ________ business improves.(2013·江西,28)
A.ifB.unless
C.afterD.when
B
解析 本题考查状语从句的引导词。句意为:她说,除非生意好转,否则她只能关掉店铺。if如果;unless除非,如果不……;after在……之后;when当……的时候。根据句意,B项符合题意。
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