=>
Ex1/
1. collecting
2. should work
3. collecting
4. should listen
5. organizing
6. should practice
7. playing
8. should use
9. taking
10. should practice
11. helping
12. should join
13. giving
14. should have
15. helping
Ex2/
1. B study
2. A summit
3. A being
4. C should have/have
5. A have
6. A get
7. A going
8. A should play
9. B sending
10. C should invite/invite
11. C closing
12. A look
13. C going
14. B travelling
15. A should eat
suggest + Ving
suggest (that) S (should) + V
-> Thể hiện lời đề xuất, gợi ý