Is your younger brother studying hard?Yes,I think he seems ___hard.选项A:study B studying C to be studying D to have studied求理由

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Is your younger brother studying hard?Yes,I think he seems ___hard.选项A:study B studying C to be studying D to have studied求理由
Is your younger brother studying hard?Yes,I think he seems ___hard.选项
A:study B studying C to be studying D to have studied
求理由

Is your younger brother studying hard?Yes,I think he seems ___hard.选项A:study B studying C to be studying D to have studied求理由
答案C
相关知识点:
seems to be / do 看起来好像 似乎
问题是问弟弟正在努力学习吗 是在现在进行时 时态对应所以选C
错项分析:
B选项不符合搭配 D选项则是不定式的完成时 A选项 一个句子不可能同时出现两个谓语动词

C
首先,根据seem to do,排除AB答案
根据前一句“正在努力学习”,所以选的不定式的进行形式to be doing,而答案D 表示过去努力了

B 问题是现在进行时态 相对应回答也是现在进行时态