Iftherearetrees,theairinourcit

If there are ______ trees, the air in our city will be _______ cleaner.

A．less, more	B．more, more
C．more, much	D．much, more

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—____ your sister know Tom? —No, she ____.

A．Do; don’t	B．Does; doesn’t
C．Do; do	D．Does; does

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—Hi, Lucy. Your skirt is very nice. —____

A．Yes, it’s nice.	B．That’s OK.
C．You’re right.	D．Thank you.

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A．come

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C．comes

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A．One

B．This

C．That

D．The one

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— Excuse me, but can I take the seat?
— , young man. It’s for the elderly only.

A．You’d better not	B．You’d better don’t
C．Why not	D．Never mind

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