Question 38. Linh no longer goes jogging when she is in grade 10.
→ Linh used  jogging when she is in grade 10.
Question 39. Mr. Pikes built two bridges in his home village a year ago.
➜ Two bridges were built  in his home village a year ago.
Question 40. She began to do her homework at 2 o'clock.
→ She has done her homework since 2 o'clock.
→ Linh used to  go 
Question 39. Mr. Pikes built two bridges in his home village a year ago.
➜ Two bridges
Question 40. She began to do her homework at 2 o'clock.
→ She has