Ithinknecessaryforusthebirds.A

I think ____necessary for us _____the birds.

A．it , protect

B．its, to protect

C．it’s , protecting

D．it , to protect

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There _______ a pen and some pencils on the desk.

A．are

B．is　

C．have

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--- ________________.

A．Yes, she is

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--------- _________________.

A．These are on the desk	B．They’re on the desk
C．It’s on the desk	D．there’re on the desk.

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— . He is Chinese.

A．Yes, he is

B．No, she isn’t

C．Yes, she is

D．No, he isn’t

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A．be

B．are

C．is

D．/

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