Creat as Newton was, many of his ideas today and are being modified by th
题型：同步题难度：来源：
Creat as Newton was, many of his ideas today and are being modified by the work of scientists of
our time. |
| [ ] |
A. have challenged
B. have been challenged
C．have questioned
D. have been questioning |
答案
| B |
举一反三
| The construction of the two new railway lines __by now. |
| [ ] |
A．has completed
B．have completed
C．have been completed
D．has been completed |
| 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 |
| When you get the paper back, pay special attention to what . |
| [ ] |
A. have marked
B. have been marked
C. had marked
D. had been marked |
| Festivals and celebrations of all kinds _________everywhere since ancient times. |
| [ ] |
A. have held
B. were held
C. had been held
D. have been held |
| If Newton lived today, he would be surprised by what ______ in science and technology. |
| [ ] |
A. had discovered
B. had been discovered
C. has discovered
D. has been discovered |
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