Помогите с англ. языком 7. There is a mistake in each sentence. Correct the mistakes. 1. Actors may learn a lot of dialogues by heart. 2. Your glass is empty. Must I refill it? 3. Would I introduce Mr. Brown to you? 4. My sister can to play a few musical instruments. 5. Some years ago I didn’t can speak English.

1. Actors learn a lot of dialogues by heart. 
2. Your glass is empty. Shall I refill it? 
3. May I introduce Mr. Brown to you? 
4. My sister can play a few musical instruments. 
5. Some years ago I didn’t speak English.