题目

This is my and those are my_______ .A. sisters ; brothersB. sister; brothersC. sisters; brotherD. sister ; brother 答案:【答案】B【解析】句意:这是我的姐姐,这些是我的兄弟们。sister姐妹,单数形式;sisters是复数形式,表示很多姐妹;brother兄弟;brothers兄弟们,是复数形式。第一个空前用的是This is…,表示单数的意思,故sister用单数;而第二个空前是those are…,表示复数的意思,故名词应用复数。选B。I’ve been working for over twenty years and seldom      so tired as now .   A.I have felt B.I had felt C.have I felt D.had I felt
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