Choose the correct alternatives to complete the sentences. 1. Students exam. 2. You 3. 4. She leave the room before the end of the lo く drive so fast. The police will stop you! switch off my mobile in class? practise the piano every day, but she to play for a long time.

Here are the correct alternatives to complete the sentences: 1. Students **should not leave** the room before the end of the exam. 2. You **must not** drive so fast. The police will stop you! 3. **Should I** switch off my mobile in class? 4. She **practises** the piano every day, but she **has not learned** to play for a long time. Let me know if you need any more help!