题目内容

The chairman threatened ________ if his policies were not adopted.

A to resign
B resigning
C to be resigned
D being resigned

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She was able to give the police a full account of since she had been ________ to it.

A an observer
B an on-looker
C a watcher
D a witness

Very few people understood his lecture, the subject of which was very ________.

A obscure
B upsetting
C distant
D inferior

Although the national government has introduced some new laws on this subject, it is the ________ state governments which are responsible for pollution control.

A precisely
B primarily
C progressively
D preliminarily

He would ________ it that his son took a livelier interest in politics.

A see into
B see through
C see about
D see to

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