Ex12: Hãy cho dạng từ đúng trong mỗi trường hợp sau:

1. They became....homeless... after the earthquake (home)

2. It is such an...enjoyable.... day that I will remember it in my mind (enjoy)

3. Everyone wants to reduce air...pollution........ (pollute)

4. ....Collecting....... stamps is one of my hobbies (collect)

5. You are working very hard. You need...to relax....... (relax)

6. Sir! I need your....signature.... (sign)

7. Her....friendly.... smile makes me happy (friend)

8. What is your..official..... work at the company? (office)

9. Thousands of.....employees... of the company have been sacked (employ)

10. I haven't visited my...house... since 2003 (home)

1. homeless

2. enjoyable

3. pollution

4. Collecting

5. to relax

6. signature

7. friendly 

8. official

9. employees

10. hometown