----There are a lot of ______ of bike riding.

----I agree. It’s good for the environment and it saves money.

A. instructions B. rules C. advantages D. products

A smile ______ nothing, but gives much.

A. costs B. spends C. cost D. spent

The water is _____. We must be careful of ______.

A. pollute, pollute B. polluted, polluted C. polluted, pollution D. polluting, pollution

----Is the film interesting ?

----I thought it would be. But ______, it’s very boring.

A. in all B. in fact C. in total D. in future

The heavy snow didn’t ______ the international airlines.

A. pay attention to B. add to C. make a difference to D. look forward to

______ down air pollution, we should ride bikes or walk instead of driving for a short distance.

A. Cut B. To cut C. Cutting D. Being cut

Three months ______ a long time for me.

A. is B. are C. have D. has

Please _____ the water when you brush your teeth.

A. take down B. turn up C. take away D. turn off

I think everyone in our country should play a part in ______ the environment.

A. protect B. protected C. protecting D. to protect

I don’t like to keep the pig as a pet because it is so ______.

A. beautiful B. good C. clever D. ugly