It is believed that a new kind of drug ______ by the scientists and they are hop
题型：同步题难度：来源：
It is believed that a new kind of drug ______ by the scientists and they are hopeful that they
will succeed in a couple of months. |
| [ ] |
A. has been developed
B. is being developed
C. is developing
D. has developed |
答案
| B |
举一反三
| Rainforests _____ and burned at such a speed that they will disappear from the earth in the near future. |
| [ ] |
A. cut
B. are cut
C. are being cut
D. have been cut |
-Have you got your test result?
-Not yet. The papers ______. |
| [ ] |
A. are correcting
B. are corrected
C. have been corrected
D. are being corrected |
—Have you moved into your new house?
—No, the rooms _____. |
| [ ] |
A. have been painted
B. are painted
C. are painting
D. are being painted |
| The most delicious bread in the world ______ by Mom. Please wait an hour to enjoy it. |
| [ ] |
A. bakes
B. is baked
C. is baking
D. is being baked |
-Have you handed in your school-work yet?
-Yes, I have. I guess it now. |
| [ ] |
A．has graded
B．is graded
C．is being graded
D．is grading |
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