题目内容

If our product ____ unsatisfactory within 7 days in any way, you can take it back.
A．showsB．provesC．makesD．performs
B

这题考查prove做连系动词的用法，意思是：”证明是”后面可以接adj/n做表语，句意是：如果我们的产品7天之内内证明是不满意的，你可以退货。选B。
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