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10.—Mary looks down today.What is up? —Well, happened between Mary and me is none of your business. A.wherever B.whoever C.whatever D.no matter what 解析 在此句中whatever引导主语从句 “...happened between Mary and me...”并且 whatever在主语从句中作主语；D项多引导状语从 句；A项不在从句中作主语；B项意思不对。 C 11.It’s really a hard job sweeping the house.They began to regret such a big house. A.persuading B.ensuring C.purchasing D.negotiating 解析 句意为：打扫房子真是一件很难的事情。他 们开始后悔买这么大的房子了。 C 12.Althouth the between the two teams is close,the are all friendly to each other. A.competition;competitors B.competitors;competitors C.competition;competition D.competitors;competition 解析 competition n.比赛；competitor n.比赛者。 A 13.It was in the small house | 
