5. Complete the sentences with the suitable form of the words in brackets.
1. I don’t like this chair. It’s ________________(COMFORT) $\to$ uncomfortable
2. What did you learn from your last ___________________? (DISCUSS) => discussion
3. Walking is a fun, easy and ____________________ activity. (EXPENSIVE) => unexpensive
4. He often drives_____________so he had an accident yesterday. (CARE) => carelessly
5. I visit my granny______________a month (ONE) => once
6. This tree has a lot of yellow_____________ (LEAF) => leaves
7. My friend, Nga plays the piano very __________ (BEAUTY) => beautifully
8. Air ___________ is a big problem in the big cities. (POLLUTE) => pollution
9. He always talks on the phone with his friend. He is very _____________ (TALK) => talkative
10. My classmate, Tim is the _____________________ player in the team. (BAD) => worst