答案:how 解析:考查宾语从句。分析句子结构可知,“________ his drinking and smoking had affected the family”是宾语从句,引导从句的连接词表示方式,故用how。
5.(2017·湖南岳阳高三质量检测)It has been proved ________ several new kinds of medicine ________ a positive effect on the cure of H7N9.
答案:that; have 解析:考查主语从句和主谓一致。分析句子结构可知,It是形式主语,真正的主语是主语从句“________ several new kinds ... the cure of H7N9”,该主语从句的引导词仅起连接作用,无任何意义,故第一空用that,从句中several new kinds of medicine作主语,谓语动词用复数形式。
6.It is no use doing ________ you like; you have got to like ________ you do.
答案:what; what 解析:考查名词性从句。句意:干你喜欢的事是没有用的;你得喜欢你所干的事。第一空引导宾语从句且在从句中作like的宾语,表示“……的事情”,故用what;第二空引导宾语从句且在从句中作do的宾语,表示“……的事情”,故也用what。
7.He jumped out of bed and ran to the door to see ________ the parcel was for.
答案:who 解析:考查宾语从句。句意:他从床上跳下来,跑到门口去看这个包裹是给谁的。分析句子结构可知,空处引导宾语从句,从句作see的宾语,且空处在从句中作介词for的宾语。
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