They tried to restrict access to ____ they believed to be dangerous areas．

A．which

B．what

C．that

D．everywhere

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参考答案

B。他们试图限制(人们)接近他们觉得危险的地区。
考查名词性从句。accesst0意为“接近，靠近”，其中to为介词，后面须跟宾语，故空格后为一个宾语从句，同时该宾语从句缺少主语，故填入what。

A．What

B．As

C．Which

D．That

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2 In this experiment, they were wakened several times during the night, and asked to report what they__

A．have just been dreaming

B．had just been dreaming

C．are just dreaming

D．had just dreamt

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3 __she wondered if she had made a mistake．

A．Not until long afterwards that

B．Not long until afterwards

C．It was not until long afterwards that

D．It was long afterwards until

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