( ) 2.______ books helpful to the students?(本题3.0分)

A、 Is this
B、 Are these
C、 Are theirs
D、 Are they

答案是:

标准答案:B
出自  青书学堂  >  佳木斯大学-大学英语Ⅱ(专升本)

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本题添加时间:2023/4/3 12:59:00