He did the right thing ________ for some fresh sir even in cold weather.

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A．to keep the children from going out

B．to prevent the children from going out

C．to keep the children going out

D．to prevent the children going out

My boss stopped ________ the machine because I'm too careless.

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Would you be ________ do me a favour, please?

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After three days' treatment, the old man was ________ to go home.

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The child was not ________ to work out the problem, though he had ________.

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A．young enough; time enough

B．old enough; time enough

C．enough young; enough time

D．enough old; enough time

Trees can be ________ paper while this paper is ________ rice straw.

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A．made of; made from

B．made from; made of

C．made out of; made up of

D．made into; made from

The doctor did ________ for the patient, so he is ________ better now.

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A．a great deal; a great deal of

B．a great deal of; a great deal

C．a great deal; a great deal

D．a great deal of; a great deal of

Success ________ to those who have strong will and work hard .

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Such people are difficult to ________.

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Thanks ________ your good advice, I'm doing well ________ English now.

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