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Since you have got such a good job, you'd better work hard

________ ________ you have got so ________ ________ job, you'd better work hard.

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You are very lucky to have a chance to study abroad.

You are ________ ________ ________ have a chance to study abroad.

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I paid 300 yuan ________ the coat.

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While in class, please fix your attention ________ the book.

用适当的介词填空

At that time life was not known ________ scientists.

用适当的介词填空

There are a lot of ways ________ make friends.

用适当的介词填空

Good measures must be taken by the government to stop some companies ________ harming the environment.

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You will regret in time.

You will regret ________ ________ ________.

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My classmates as well as I went to the park yesterday.

My classmates went to the park yesterday. I went, ________ ________.

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He came to Beijing for the first time.

It is the first time that he ________ been ________ Beijing.