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Scientists say they are beginning to _____ in the fight against cancer.

A．break in

B．break out

C．break down

D．break through

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–What does the sign on the right tell us?
--Oh, it tells us that we ________ to stop our cars here.

A．don’t allow	B．aren’t allowed
C．didn’t allow	D．weren’t allowed

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–How is your father going to Naning?
--I’m not sure. He _____ drive there.

A．may

B．can

C．must

D．will

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Your dream won’t come true _______ you know what your dream is.

A．after

B．unless

C．because

D．though

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Our teacher always gives us good advice. We should follow .

A．what they say	B．what they said
C．which they say	D．which they said

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If our government attention to controlling food safety now, our health in danger.

A．won’t pay; is	B．doesn’t pay; is
C．won’t pay; will be	D．doesn’t pay; will be

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