1.       It has been proven that regular exercise may ________________ people’s life expectancy. (long)

2.       People often consider pine trees as a symbol of ________________. (long)

3.       Big Brothers is a ________________ organization which helps boys with no fathers. (volunteer)

4.       Many ________________ are standing outside the stadium, waiting for him. (support)

5.       Their parents seem to be very ________________ of the teachers. (support)

6.       The six ________________ are making preparations for the final ground. (final)

7.       They ________________ won the trophy after many years of competition. (final)

8.       The number of car accidents throughout the countries is increasing ________________. (control)

9.       Our city is a(n) ________________ place. There is not enough space to live. (populate)

10.       ________________ is a situation when there are too many people in a place. (populate)

11.       People in countries with high ________________ growth rates often live in poverty. (populate)

12.       ‘Xông đất’ is a ________________ activities in Vietnam at Tet. (tradition)

13.       The festival is ________________ held in May. (tradition)

14.       He ________________ to work in mountainous areas last summer. (volunteer)

15.       Marcus wanted to win the game, so he played it very ________________. (compete)