请问这个选择题,应该选什么为什么?其它的为什么不对呢?
请问这个选择题,应该选什么为什么?其它的为什么不对呢?
many students face problems when they have to study a subject ____.
A.that they think it is difficult B.that they think is difficult
C.which they think that is difficult D.they think it is difficult
many students face problems when they have to study a subject ____.
A.that they think it is difficult B.that they think is difficult
C.which they think that is difficult D.they think it is difficult
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你能帮帮他们吗