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Everyonehastoworkverycarefullybecausethere()anymistakesinit.A.mustnotbeB.mustnothave讲明选择理由啊~theremustnothave这一结构不行吗?

题目详情
Everyone has to work very carefully because there ( ) any mistakes in it .
A.must not be B.must not have
讲明选择理由啊~
there must not have 这一结构不行吗?
▼优质解答
答案和解析
答案A.
原因状语从句里面是个there be句型.加上情态动词must就是there must be,否定句是there must not be...there be句型不能再有have了.