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题型：单选题 题类：常考题 难易度：容易
新目标英语2017-2018学年八年级上册Unit 9同步评估（音频暂未更新）
—Sorry ，I go to see my grandparents.
— It ________ be him. He has gone to New York on business.
— I think so, and we ______ stay at home now.
—I've no idea. She be in the science lab.
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