Professor James will give us a lecture on the Western culture, but when and wher
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Professor James will give us a lecture on the Western culture, but when and where _____ yet. |
A. hasn"t been decided B. haven"t decided C. isn"t being decided D. aren"t decided |
答案
举一反三
With the help of high technology, more and more new substances _____ in the past years. |
A. discovered B. have discovered C. had been discovered D. have been discovered |
Though we don"t know what is discussed, yet we can feel the topic _______. |
A. had changed B. will change C. was changed D. has been changed |
In recent years many football clubs _____ as business to make a profit. |
A. have run B. have been run C. had been run D. will run |
More patients _____ in hospital this year than last year. |
A. treated B. have treated C. had been treated D. have been treated |
— The window is dirty. — I know. It _____ for weeks. |
A. hasn"t cleaned B. didn"t clean C. wasn"t cleaned D. hasn"t been cleaned |
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