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______ scientists have learned a lot about the universe, there is much we still don't know.

A．Once

B．Since

C．Though

D．Unless

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A friend has told me about_______restaurant near here.

A．a little nice fish	B．a nice little fish
C．nice a little fish	D．a fish nice little

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Many people can hardly______to buy a flat ,especially in big cities such as Beijing,Shanghai and Shenzhen.

A．permit

B．afford

C．expect

D．offer

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After watering the grass, Petera notice by its side, which reads “Keep Off”.

A．gave up

B．made up

C．put up

D．took up

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The eyes react______light,as everybody knows.

A．with

B．against

C．on

D．to

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---Can I ask you a personal question?
---________.

A．That’s all right	B．Take it easy
C．You are welcome	D．Go straight ahead

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