2019-2020学年外研版高中英语必修1课件：Unit 2 Period Three Grammar & Writing --302edu教育资源网

[即时跟踪2]　用所给动词的正确形式填空 (1)Let's get down to (do) the experiment. (2)He insisted on (do) it in his own way. (3)He is busy (prepare) for the examination.

doing

preparing

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