Each of the following sentences has one mistake. Identify and correct the mistakes (Tìm và sửa lỗi)

1. Ba often does his homeworks in the evening.                                                                    ………………

2. They aren’t go to bed at 9 o’clock.                                                                         ………………

3. That’s my sister over there. She stands near the window.                                      ………………

 4. Her garden is big. It’s a garden big.                                                                                  ………………

 5. He’s waiting to the bus at the moment.                                                                             ………………

6. My father never have lunch at home.                                                                                 ………………

7. We need eight hundred gram of beef.                                                                                ………………

8. Do you know how many teachers does your school have?                                                ………………

9. How long are you going to staying in Vietnam?                                                    ………………