33: Helen started to learn Chinese in 2000.=> Helen has learnt Chinese since 2000
Question 34: About thirty million people are watching this programme.
=> This programme is being watched by about thirty million people
Question 35: The boys said, "We have to try our best to win the match,"=> The boys said that they had to try their best to win the match
.........
Question 36: She asked Lan how many members there were in her family.
=> She asked Lan: ".How many members are there in your family?"
Question 37: Many people think there is no city in Vietnam that is cleaner than Da Nang City. (the)
=> Da Nang city is thought to be the cleanest city in Vietnam
Question 38: It rained very heavily. We cancelled the trip to the famous Bat Trang craft village. (since)
=> Since  It rained very heavily, we cancelled the trip to the famous Bat Trang craft village
Question 39: David has a good relationship with most of his colleagues. (gets)
=> David gets on well  with most of his colleagues
Question 40: Did you always eat sweets when you were small? (use)
Did you used to  eat sweets when you were small?