低钾血症主要表现为： A．气血充足 B．气火有余 C．血虚 D．血络受损 E．余毒日

How do you go to school? Some students may answer, “By car”. Maybe some others will look at them through green glasses (羡慕地).
You         feel bad if you have no cars. It’s true that cars are        . Many people find it hard to think about         life will be like if they have no cars. But now more people know that too many cars bring great        . They make streets too        .
People are trying to stop pollution (污染) from cars.         way is to make green cars. But it         much to make these cars. And more people think about better ways. We can         our lifestyle. A lot of Americans go to work         bike now. Riding bikes is clean and healthy. It helps people get strong. Let’s try together! I hope we can live in a green world with no pollution        .   

小题1:	A．can’t B．needn’t C．won’t D．aren’t

小题2:	A．interesting B．important C．different D．dangerous

小题3:	A．what B．how C．why D．where

小题4:	A．lessons B．fun C．skills D．problems

小题5:	A．small B．clean C．busy D．modern

小题6:	A．Other B．Another C．One D．The other

小题7:	A．uses B．spends C．pays D．costs

小题8:	A．have B．change C．enjoy D．make

小题9:	A．by B．on C．with D．from

小题10:

A．any days B．some days C．some day D．any day