4. It is difficult.
5. I have to look.
6. Mrs. Hoa understands an English poem.
7. I look after my younger sister when my parents go to work.
8. Mrs. Hoa has taught English since 2009.
9. Can you turn off the T.V because I want to know about the weather forecast?
10. My mother dislikes listening to the radio.
11. She asked me where I work in this factory.
12. My father worked in this company two years ago.