1)All the students ( ),the report bagan.2) All the students ( ),and the report began.1.) A.were seated B.seated C.were sitting D.sat down2.)A.had seated B.seaded C.were sitting D.sat down我想选C和B,第二题感觉好像对着呢,应该是祈使

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1)All the students ( ),the report bagan.2) All the students ( ),and the report began.1.) A.were seated B.seated C.were sitting D.sat down2.)A.had seated B.seaded C.were sitting D.sat down我想选C和B,第二题感觉好像对着呢,应该是祈使
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1)All the students ( ),the report bagan.2) All the students ( ),and the report began.1.) A.were seated B.seated C.were sitting D.sat down2.)A.had seated B.seaded C.were sitting D.sat down我想选C和B,第二题感觉好像对着呢,应该是祈使
1)All the students ( ),the report bagan.2) All the students ( ),and the report began.
1.) A.were seated B.seated C.were sitting D.sat down
2.)A.had seated B.seaded C.were sitting D.sat down
我想选C和B,第二题感觉好像对着呢,应该是祈使句,但第一题的CD不知道有什么区别,希望会的同学帮忙区分一下两句话的考点和每个选则的原因

1)All the students ( ),the report bagan.2) All the students ( ),and the report began.1.) A.were seated B.seated C.were sitting D.sat down2.)A.had seated B.seaded C.were sitting D.sat down我想选C和B,第二题感觉好像对着呢,应该是祈使
第一句中,在A和C 中选择.因为,seat不能直接用,sit down 也是不能直接用,常用语祈使句或者自己独立作为一个短语句子.又因为在这个句子中,主句是the report began.逗号前半部的句子是从句,也很可能是条件或者假设的从句,所以分词形式完全可以用,没有实际意义,只表示条件或者假设.现在分词表示动作正在进行,过去分词表示动作已经完成并且对现在有影响,所以选择A.
第二句,也选择A