It’stenyearssincethescientisto

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It’s ten years since the scientist ____ on his life’s work of discovering the valuable chemical.

A．made for

B．set out

C．blocked out

D．turned up

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We have every reason to believe that 2008 Beijing Olympic Games will besuccess.

A．不填 ;a

B．the ;不填

C．the ;a

D．a ;a

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He has worked the maths problem for nearly an hour but he simply can’t work it.
On ;atB. on ;out C. at ;up D. for ;out

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Every means ______ tried but without much result.

A．has been

B．have been

C．are

D．is

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______ is to attend our evening.

A．both the singer and the dancer	B．Either the singer or dancers
C．The singer or dancers	D．The singer and dancer

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If you keep __________ English, you can learn English well.

A．practising speak	B．practising speaking
C．practising to speak	D．to practise spoken

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