- Up to now, large quantities of food ____ to Africa to save the starving people.[ ]A. is sentB. has been sentC. have b...
- Every possible means ________ to prevent the air pollution, but the sky is still not clear.[ ]A. has been usedB. are ...
- Every possible means _______ to prevent the air pollution, but the sky is still not clear.[ ]A. is usedB. are usedC. ...
- The construction of the two new railway lines ________ by now.[ ]A. had completedB. have been completedC. has been co...
- For a long time we that going to university and getting a degree will ensure a financially stable future.[ ]A. are to...
- His sister left home in 1998. and _________ since.[ ]A. had not been heard ofB. has not been heard ofC. had not heard...
- ----Why does the lake smell terrible?----Because large quantities of water_______?[ ]A. have pollutedB. is being poll...
- --- Will you attend the meeting this afternoon?--- But I ________ anything about that.[ ]A. hadn’t been toldB. haven’...
- His sister left home in 1998, and _________ since.[ ]A. had not heard ofB. has not heard ofC. had not been heard ofD....
- In the last few years thousands of films______ all over the world.[ ]A. have producedB. have been producedC. are prod...
- —Why do you look so worried?—My computer broke down and my essay ________ unfinished since.[ ]A. had leftB. hasleftC....
- — Why does the lake smell terrible?— Because large quantities of water ________.[ ]A. have pollutedB. is being pollut...
- Professor James will give us a lecture on the Western culture, but when and where ________ yet.[ ]A. hasn't been deci...
- The construction of the two railway lines ________ by now.[ ]A. has completedB. have completedC. have been completedD...
- His uncle went abroad in 2010, and_____ since.[ ]A.has not been heard ofB.had not been heard ofC.had not heard ofD.ha...