At the international conference, the scientist gave a report (base) ______ on hi

游客2023-09-26  32

问题 At the international conference, the scientist gave a report (base) ______ on his recent experiments.

选项

答案 based

解析 本句中,主语是the scientist,谓语是gave,因此base需要变成非谓语动词的形式,report和base之间是被动关系,所以采用过去分词。
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