Đề thi của Hà Tĩnh =)))))))
34. David has been cooking dinner for 30 minutes
35. M asked L if she often went swimming in the summer
36. Would you mind cleaning the floor?
37. The project should be completed within a year
38. I am under the impression that the work has already been finished
39. Mai got up early yesterday so as to catch the first bus
40. The manager have the report written by his secretary last Tuesday