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In the last year, China has sent up many ______ satellites, _______ a weather satellite, a science satellite, a TV satellite and so on.

I prefer ______ at home to ______ outside.

She was heard _______ at English song.

Mr. Green told us _______ talk loudly in class.

     into the school basketball team is a great pleasure for me． 

If we don’t start now, we must risk     the train.

You never imagine what trouble I have had ______ your house．It took me nearly 2 hours．

The Changjiang River has been polluted badly and is not good _______．

The students forbidden _____ after class in WC are prevented _____ after school.

Our school forbids_____ ,that is to say, we are not allowed ____ at school.