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__ carefully if any change occurs when doing experiments in the lab..

A．Observe	B．To observe
C．Observed	D．Observing

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—Tom, help me buy two tickets for this weekend’s concert online.
—Sorry, there is no ticket _______ online now.

A．acceptable

B．convenient

C．accessible

D．available

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Anti-Japanese War _______ in 1937 and it _______ eight years

A．was broken out; was lasted	B．broke out; lasted
C．happened; was continued	D．was happened; continued

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---Do you know what WWF______ ?
----Yes. That’s World Wide Fund for Nature.

A．stand for

B．look like

C．stand

D．like

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In developed countries, farm workers _________ only a small section of the population.

A．pick up

B．make up

C．hold up

D．keep up

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Science and technology __________ nowadays in our socialist construction.

A．plays an important part	B．play an important part
C．play important parts	D．take important parts

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