importantforuswildanimalsandbi

_____ important for us _____wild animals and birds.

A．It; protect

B．It; protecting

C．It’s; to protect

D．They’re; protect

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— Could you tell us ______ ? —About two weeks.

A．how often are you going to be away

B．how often we are going to be away

C．how long are we going to be away

D．how long we are going to be away

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The first thing ______ we should do is to tell him the news.

A．who

B．which

C．that

D．whom

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What way can you think of ______ the mice in the room?

A．how to kill

B．to kill

C．killing

D．killed

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A．is regarded

B．has regarded

C．is regarding

D．regards

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______ the work is difficult, all the workers are keeping on working .

A．But

B．Although

C．And

D．So

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