—Have you got your exam papers?—Not yet. I guess they ________ at this moment.[
题型：同步题难度：来源：
—Have you got your exam papers?
—Not yet. I guess they ________ at this moment. |
| [ ] |
A. are being graded
B. are grading
C. have graded
D. have been graded |
答案
| A |
举一反三
Now the world"s attention________the stocking markets，as they have great influence on the world"s
economy. |
| [ ] |
A. is fixing on
B. has fixed on
C. is being fixed on
D. had been fixed on |
—Have you washed your clothes yet?
—They________ now. |
| [ ] |
A. has washed
B. is washed
C. are being washed
D. is washing |
| I have to go to work by taxi because my car at the garage. |
| [ ] |
A. will be repaired
B.is repaired
C. is being repaired
D.has been repaired |
—Have you handed in your schoolwork yet?
—Yes, I have. I guess it now. |
| [ ] |
A. has graded
B. is graded
C. is being graded
D. is grading |
| Although the causes of cancer , we do not yet have any practical way to prevent it． |
| [ ] |
A．are being uncovered
B．have been uncovering
C．are uncovering
D．have uncovered |
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