IV. Underline the mistake and correct. 1. She must wear uniform when she was in duty last year. 2. The students should learn their lessons careful before the exams. 3. The girl doesn't look happily. I think she is crying. 4. Don't worry so much. The children can look after ourselves. 5. Tom can't go out with us this evening. He have to work. 3. You must not to let children play in the kitchen.
