isevenmoreimportantistheearthc

is even more important is the earth cooled down, water began to appear on its surface.

A．When; that; when

B．What; whether; as

C．What; that; as

D．lt; whether;

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____ the Internet is of great help, I don’t think it’s a good idea to spend too much time on it.

A．While

B．As

C．Because

D．If

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–They started an hour ago and they ____ be here in fifteen minutes, I think.

A．can

B．would

C．should

D．must

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–Yes. Some of them are good and the film Avatar ____ is excellent.

A．in common

B．in total

C．in particular

D．in general

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Jack, it’s your fault. You must ____ your differences and get down to the task.

A．put away

B．put off

C．put out

D．put aside

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–How much did that so-called teacher ____ for her teaching out of class?

A．spend

B．pay

C．cost

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