environmentaldamageisdone，itta

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______ environmental damage is done，it takes many years for the ecosystem to recover．

A．Even if	B．If only
C．As if	D．Once

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China won Olympic gold in the women's short track 3,000 metres relay on Wednesday, with Canada ____ the silver．

A．picking up

B．taking up

C．looking up

D．bringing up

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_____ in the regulations that you should not tell other people the password of your e-mail account.

A．What is required

B．What requires

C．It is required

D．It requires

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The conference has been held to discuss the effects of tourism ______ the wildlife in the area.

A．to

B．on

C．at

D．with

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I’ve already told you that I’m going to buy it, ________.

A．how much does it cost	B．no matter how it costs
C．however does it cost much	D．however much it costs

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As high school students, it’s very important to keep ourselves ______ of what’s happening home and abroad every day.

A．to inform

B．informing

C．informed

D．be informed

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