IV. Each sentence has a mistake find and correct it.
1. Having studied in English for three years, Lan is used to speak English with her classmate. 2. Sarah was the more capable of the three girls who took part in the play. 3. They study English for several years.4. They work hardly from morning till night. 5. Nam’s father is accustomed to stay up late typing his documents. 6. His teacher doesn’t allow to talk in class. 7. There were so much people that there weren’t enough seat for every one. 8. They are believing in the story that he is making up. 9. He left the room without to say a word. 10. Lan wishes that she went to the party last night