—Mustwekeepthewindowallthetime

—Must we keep the window _______ all the time?
—No, you don’t have to.

A．opening	B．opened
C．to open	D．open

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We _______ pay to get into the concert. It's free.

A．can't

B．mustn't

C．might not

D．don't have to

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--Good morning, sir! _________?
-- I'd like to buy a sweater for my daughter.

A．What can I do for you	B．What are you doing
C．How about the sweater	D．Can you help me

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You have to be ______ and wait until I finish my work.

A．patient

B．strict

C．honest

D．active

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--My parents and I will go to London for a trip tomorrow. --Really? __________.

A．I don't think so	B．Have a good time
C．That's very strange	D．You should try it

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- My friend has achieved his goal after years of hard work. - Great! ________.

A．One tree can't make a forest

B．Where there is a will, there is a way

C．Many hands make light work

D．A friend in need is a friend indeed

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