necessaryforusourenvironmentcl

_______ necessary for us _______ our environment clean and tidy.

A．This is; keep

B．That’s; to keep

C．It’s; to keep

D．It’s; keep

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相关试题

—_________?
—He’s fat and medium height.

A．What does he do	B．How old is he
C．What does he look like	D．What is he doing

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—I’ll go for a school trip.
—I hope you have a good trip.
—__________

A．Thanks.

B．Me too.

C．Sure, I will.

D．You too!

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—Thank you very much.
—__________.

A．No, thanks	B．You’re welcome
C．Don’t thank me	D．All right

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There’s________ interesting pay phone next to_______ post office.

A．a, the

B．an, a

C．a, /

D．an, the

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Toronto is a city in________.

A．the USA

B．Canada

C．Australia

D．France

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