Through doing this, the teacher will be able to ascertain the extent to __________the children understand what they are reading.

2023-08-04

A.how ?
B.which
C.that ?
D.what

参考答案:B

考查定语从句。主句为“the teacher will be able to ascertain the extent”,定语从句为“to the children anderstand what thev are reading”.先行词为extent.短语to…extent意思是“到……程度”。句意为“这样做,老师就能确定孩子们对他们所读的内容理解到什么程度了”。故选B。

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