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The Chinese began to make paper 2 000 years ago.

It is 2 000 years ________ the Chinese _________ _________ _________ paper.

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The two scientists found that to make people accept their theories was difficult.

The two scientists found _________ _________ to make people accept their theories.

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I don't doubt that my deskmate will be able to pass the 2005 National Matriculation English Test.

________ _________ ________ that my deskmate will be able to pass the 2005 National Matriculation English Test.

用所给动词的适当形式填空

I need one more stamp before my collection _____________ (complete).

用所给动词的适当形式填空

The nice food _______________(serve) by the restaurant.

用所给动词的适当形式填空

I ____________(give) ten minutes to decide whether I should reject the offer.

用所给动词的适当形式填空

If city noises ___________（not keep）from in creasing, people __________ （have to）shout to be heard even at the dinner table 20 years from now.

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The house built last year is our classroom.

The house ________ ________ ________ last year is our classroom.

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It was an island．I have forgotten its name.

It was an island ________ ________ I have forgotten.

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I'm sure that he'll come tomorrow.

It is _____ that he'll come tomorrow.