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题型：单选题题类：常考题难易度：普通

江苏省梁丰高级中学2018-2019学年高一下学期英语开学检测试卷

Professor Li has ________ the behavior of bees for many years, and they have been observed ________ to communicate information.

A、noticed; dance B、observed; to dance C、seen; dancing D、watched; dance

举一反三

Jack coughed day and night. The doctor ______ him to ______ smoking.

If you don't know how to use an English word, the easiest way is to a dictionary.

No matter how carefully you plan your finances, no one can _______ when the unexpected will happen.

If you just spend time __________ advantages and disadvantages, you may get nothing in the end.

_________ this phenomenon, we must take some measures to deal with it; otherwise, it will _________ great losses in the future.

Whoever is in charge of the mining company will ________ the responsibility for safety accidents.

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