Colds are very ________ in that area every spring and early summer.

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I can't lend you a hand ________.You see how busy I am!

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A. at present

B. presently

C. all the time

D. at one time

According to the recent research, smoking and lung cancer is not necessary ________ and effect.

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Careless driving ________ a lot if high way accidents.

[　　]

--The cars give off a great deal of waste gas in the streets.

--Yes. But I'm sure something will be done to ________ air pollution.

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The house is too small and there is no________left for the big bookshelf.

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I can hardly________ the difference between these two words.

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I don't think________ Jenny can come home this weekend．

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--My foot hurts terribly,doctor.

--Well,I wonder _______ it has been like this.

[　　]

Please tell me _______ you would like to have your coffee--black or white?

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