She says that she'll have to close the shop business improves.A. ifB. unlessC. afterD. wh

问题补充：

She says that shell have to close the shop business improves.

A. if

B. unless

C. after

D. when

答案：

A. if

(答案→)B. unless

C. after

D. when

解析：考查连词：A. if如果，B. unless除非，如果不，C. after在…后面，D. when当…时候，句意：她说她将不得不关掉商店，如果生意没有改善的话。选B。