21. I _____(write) my report on white pollution for five five days but I have completed 10 pages. 22. Many books (write)______by Thomas already 23. The zookeepers _____(capture) the lion in the forest recently. 24. What weather ! It ______(rain) continously for four days! 25. Covid-19 patients ______ (well-treat)since they were found to catch it. 26. Lakes , rivers and oceans ______(get) more and more polluted . 27. The birds _____(feed) in the yard at present. 28. The unemployment rate _____(fall) over the last few months. 29. Rice ______(often/grow) in tropical counties. 30. You look exhauseted. ______(you/work) on the computer for too long.

21. have been writing ( hành động vẫn đang diễn ra, chưa hoàn thành )

22. have been written ( có already thì dùng present perfect mà ở đây bị động nên dùng have been )

23. have captured ( có recently thì dùng present perfect).

24. has been raining ( có continuously, vẫn đang xảy ra ).

25. have been well-treated ( được chăm sóc tốt )

26. is getting ( đang diễn ra, ngày càng trở nên... getting more and more...)

27. are being fed ( thì present continuous ở dạng bị động )

28. has been fallen ( có over the last few months )

29. is often grown ( thế bị động, được trồng )

30. You must have been working ( hẳn là, chắc chắn là: must have been )

* nếu câu này chỉ yêu cầu dùng past/present perfect thì viết là: You have been working, bỏ must đi 

Chúc em học tốt nhé ^^

Có thắc mắc gì thì hỏi nhe em