题目内容

All the police officers were equipped _________ guns to defend themselves against the criminals.

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She completely lost her voice and had to give _____ teaching.

Even the mechanic couldn’t figure ______ what had gone wrong with the car.

The factory is faced ________ many problems as a result of years of bad management (管理).

After he moved abroad, he kept writing letters to his parents to inform them ______ his situation there.

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