Life is tough in the city. In order to lose their ________, some people drink alcohol.

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Those who change mobile phones frequently will pay a heavy price for being 　　  .

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One of the consequences of our planer's being warming up is a(n) ________ in the number of natural disasters.

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There is a new problem involved in the popularity of private cars ________ road conditions need ________.

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A．that…to be improved

B．which…to be improved

C．where…improving

D．when…improving

An army spokesman stressed that all the soldiers had been ordered ________ clear warnings before firing any shots.

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Dad, I've finished my assignment.

Good, and ________ you play or watch TV, you mustn't disturb me.

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I can think of many cases ________ students obviously knew a lot of English words and expressions but couldn't write a good essay.

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It is pretty well understood ________ controls the flow of carbon dioxide in and out the atmosphere today.

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Generally speaking, ________ according to the directions, the drug has no side effect.

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Only when your identity has been checked, ________.

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