三、完形填空。

Early in the morning，at noon，or in the evening in big cities and in the countryside，all across the United States，you can see Americans running.Men and women，__21__ and old are running.People run __22__—along the beaches of California，__23__ Central Park in New York，down quiet streets in small towns or at the gym.Some people even run in __24__ living rooms.

Running didn't use to be so popular.In the 1960s，runners were __25__ athletes and healthy strong people.In those days，when people saw a runner，they used __26__，“Hey，what's the hurry for?”Or they might say to __27__，“Is he crazy?”Women almost never __28__.If they did，they might hear a man shout，“If I __29__ you，can I keep you?” But today all these have __30__.Men and women of all __31__ enjoy running.

Doctors say many of the health problems in the United States __32__ these bad habits：eating too much，smoking cigarettes，and __33__ exercising enough.Doctors tell us，“Eat less，don't smoke，and exercise more.” Running is a good exercise __34__ it helps build strong hearts and lungs.It also helps most people __35__ weight.

( A )21.A.young　B.small　 C.big　　 D.little

( C )22.A.anywhere B.somewhere

C.everywhere D.nowhere

( B )23.A.by B.through

C.with D.on

( D )24.A.our B.your C.his D.their

( A )25.A.mostly B.hardly C.most D.never

( D )26.A.to asking B.to tell

C.to speak D.to ask

( B )27.A.them B.themselves

C.theirs D.they

( B )28.A.thought B.ran

C.said D.exercised

( A )29.A.catch B.take C.carry D.find

( A )30.A.changed B.stopped

C.worked D.done

( D )31.A.people B.cities C.villages D.ages

( A )32.A.come from B.look for

C.care for D.think of

( B )33.A.too B.not C.much D.little

( C )34.A.how B.where C.because D.until

( D )35.A.give B.increase

C.improve D.lose