Đáp án:

1. 
   All the students in the class have been invited by the teacher.
2. 
   Tom asked me why I liked that/ this job.
3. 
   If she were strong enough, she could lift the table.
4. 
   Because of his broken bike, he arrived late for the concert.

33. ________ have been invited by the teacher

34. ________ why I liked that job

35. ________ she were strong enough, she could lift the table

36. ________ his broken bike, he arrived late for the concert

37. He stopped smoking 3 years ago

38. It is the new computer which has been bought by my father

39. I wanted some stamps, so I went to the post office

40. Although the weather was bad, we had a picnic