Yesterday evening I ________ a book on science．I'll try to finish it today．

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Who can you turn to for help，it not __________?

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--What do you think of the school?

--It's a very good ________.

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A. school to study

B. school to studying

C. school to study at

D. studying school

----I didn't go to see the doctor yesterday. But you ________.

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________hearing the good news, they jumped with joy.

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----Will you go to attend her party?

----No, ________.

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A．even though invited to

B．even if invited

C．if not invited

D．unless invited to go

There is no doubt ________ people ought to struggle against pollution.

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The facts have proved ________.

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The chair, one of ________ legs is broken, needs repairing.

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The man came up to a lonely cottage, ________ there a while, and then entered it with great interest.

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