622] I don’t think Mary and Sue before, ? [译文] 我认为以前Mary 和 Sue没有见过面.是么? A. have met; haven’t they B. have met; have they C. have seen; do I D. have seen; don’t they [答案及简析] B. 主句是第一人称.而且谓语动词是think, find, believe,make等.反意疑问句要和宾语从句一致,而且还得注意否定的转移问题. 【
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