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D. to ( ) ________ his keys? A. is B. are C. am D. be ( ) her hat on the chair? A. Is B. Are C. Can D. Do B B A 第 1課時分層訓(xùn)練 【 解析 】 答句用 it代替名詞 ball;由 “It39。s under the chair.”可知用否定回答。 ( )6.—Is the ball on the chair? —________. It39。s under the chair. A. Yes, it is B. No, it isn39。t C. Yes, she is D. No, he isn39。t B 第 1課時分層訓(xùn)練 【 解析 】 e on 意為 “快點兒 ”。 ( )7.—Are________ Grace and Emily? —Yes, and this is________ friend, Ann. A. they。 they B. their。 they C. they。 their D. thei