题目内容

We don’t know which company she was _________ (refer to) when she talked about competing firms at the meeting.

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The police are trying to _________ (certain) exactly who were at the party last night when the fire took place.

If you want to become master of a language you have to study it in ________ (deep) for years.

Last week the plane crashed in the desert and the scientists are now ____________ (investigate) to find out the cause of the crash.

广播电视新闻节目越来越要求权威性、信息量和可看性的高度统一。

A. 对
B. 错

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