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2. Make up interrogative and negative sentences from the following ones.

Example: A new library has been built in our street.
Has a new library been built in your street?
A new library has not been built in our street.

1) Many schools have been constructed this year.

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2) The new project has been finished already.

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3) Our library has been turned into a shopping centre.

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4) The problem has been discussed already.

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5) The letters have been posted.