After many years of careful experiments they are able to ________ the growth of corn． 　　　

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A． advance 　　　B． march 　　　C． produce 　　　D． develop

_______________ you can get rid of the dirty marks.

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A. By the way   B. In the way   C. In a way   D. In this way

I was chosen ______________ the experiment.

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He is ________ a fool than I am.

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Success ________ hard work, while idleness ________ failure.

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There was a ________ look ________ her face.

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Don't forget the past while we are ________ a happy ________.

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You won't be able to do important things if you are always ________ small successes.

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________ reading the text, you should also finish the exercises in your student's book.

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—How's your work ________?

—Nicely.

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