13. English we must work hard at it.A．So as to masterB．MasteringC．Master

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13. English we must work hard at it.

A．So as to master

B．Mastering

C．Mastered

D．To master

答案

解析

略

举一反三

2. Why did Jane go to Africa to study chimps in the wild? Because she wanted .

A．to work with them in their own environment
B．to prove the way people think about chimps was wrong
C．to discover what chimps eat	D．to observe a chimp family

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2.Operations which left patients and in need of long periods of recovery time now leave
them feeling relaxed and comfortable.

A．exhausted

B．injured

C．ridiculous

D．delighted

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4. Have you heard of the town when they built the dam?

A．submerge

B．submerging

C．being submerged

D．submerged

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5. China has made great progress in the sun’s rays as a source of energy.

A．harness

B．harnessing

C．harvest

D．harvesting

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11. ——What does the hydro-electric project of the Three Gorges Dam mean?
——It means the danger of flooding.

A．to bring an end of	B．to bring an end to
C．bringing an end of	D．bringing an end to

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