摘要：29． Every possible means , but the teacher as well as the students found a solution to the problem yet. A. has been tried; hasn’t B. has tried; haven’t C. have tried; haven’t D. have been tried; hasn’t
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Every possible means ________, but the teacher as well as the students ________ found a solution to the problem yet.
A. has been tried; hasn’t B. has tried; haven’t
C. have tried; haven’t D. have been tried; hasn’t
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Every possible means ________, but the teacher as well as the students ________ found a solution to the problem yet
- A.has been tried; hasn’t
- B.has tried; haven’t
- C.have tried; haven’t
- D.have been tried; hasn’t
Every possible means ________, but the teacher as well as the students ________ found a solution to the problem yet.
| A．has been tried; hasn’t | B．has tried; haven’t |
| C．have tried; haven’t | D．have been tried; hasn’t |