=>
1. solution (a + N)
2. grammatical (adj N)
3. attendance : sự tham dự, có mặt
4. necessity (a + N)
5. harmless (be adv adj)
6. satisfaction : sự hài lòng
7. tighten (to V))
8. reliable (become very adj)
9. creative (be very adj)
10. signature : chữ ký