ChildreninChinatodayhavenothin

Children in China today have nothing ______.

A．to worry	B．worried
C．to worry about	D．worrying about

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—If he ___________, he ________that food.
—Luckily he was sent to the hospital immediately.

A． was warned; would not take	B．had been warned; would not have taken
C．would be warned; had not taken	D．would have been warned; had not taken

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When a pencil is partly in a glass of water, it looks as if it _______.

A． breaks

B．has broken

C．were broken

D．had been broken

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One learns a language by making mistakes and _______ them.

A． correct

B．correcting

C．corrects

D．to correct

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_____such heavy pollution already, it may now be too late to clean up the river.

A． Having suffered

B．Suffering

C．To suffer

D．Suffered

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—Will you stay for lunch?
—Sorry, ____________. My brother is coming to see me.

A． I mustn’t

B．I can’t

C．I needn’t

D．I won’t

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