Đap án:
37.Scholarships to the US were won by two of our classmates last year.

38.May I borrow one of your books?

39.The monitor informed the class that they would have a science competition this week.(inform cos thể đổi thành "said to")

40.The scientists stated that they are currently searching for a habitable planet. (stated cos thể đổi thành "said to")
41. He can never construct a computer because he doesn't have enough money.

42. Nam is currently having a video conference with his colleagues in Asia.

GIẢI THÍCH"
38. "Two scholarships to the US" là chủ ngữ câu, and "were won" Là cấu trúc bị động. Còn cụm "by our classmates" giữ nguyên, để xác định" who won the scholarships."

39. Động từ "informed"được dùng để tường thuật cho the monitor said. Còn cụm "that they would have a science competition this week" giữ nguyên,để xác định content of the information.

40.  Động từ "stated"được dùng để tường thuật cho scientists said. Còn cụm "that they are currently searching for a habitable planet" giữ nguyên, để xác định content of the statement.

41. S+V+N

42. S+V+N