题目内容


. By the year 2020 scientists _____ a lot of research on AIDS.
A．had doneB．doC．are doingD．will have done
D
略
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The United States _______one of the lowest smoking rates －25.5 percent of the population.
A．isB．haveC．hasD．are

Some buildings built in the past _______ down and new ones are being built there.
A．will be pulledB．had been pulledC．have been pulledD．are pulling
—I’ll call you at 9 tomorrow morning, OK?
—You’d better not, I ______ the piano then.
A. will be practicing                                        B. am about to practice
  am practicing                                        D. practiced

Give me an undisturbed hour and I’ll see the work Tom ___ unfinished.
A．will leaveB．is leavingC．has leftD．had left

——It's too hot today.Will it rain tomorrow?
——I would rather it         tomorrow.
A．would rainB．rainedC．rainD．will rain

By the time she reached the corner of the street, the footsteps _________.
A．had goneB．were goneC．are missing D．have disappeared

The first half of the eighteenth century _____ the rise of quite a number of new writers, although most of them _____ hardly _____ to the general public today.
A. sees; ×; know             B. saw; are; known
B. has seen; have; known      D. had seen; have; been known

单项填空（共15题，每小题1分，共15分）
Mr. Smith, along with Mr. Green, ___ coming to speak to us about Chinese literature and painting tomorrow afternoon.
A．isB．areC．wasD．were

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