Как правильно выбрать слова в следующих предложениях по английскому языку?

1. You can / must raise your hand and wait before you ask a question.
2. In the old days, teachers could / should hit students with a ruler if they misbehaved in class.
3. In certain schools, students may / must stand when their teacher enters the room.
4. Steven wants to go out but his mum said he needn’t / can’t go until he has finished his homework.
5. We need / mustn’t to decide who will be class president.
6. I didn’t see Bill today, he should / must have taken the day off.
7. Kate looked pale in the doctor’s office. She may / might be ill.
8. In Britain, all teens have to / may stay in school until they are 16 years of age.
9. You should / might spend time studying if you want to get good marks.
10. “Can / May I leave early today, please?” Sarah asked.

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Правильные варианты:

• You can raise your hand and wait before you ask a question.
• In the old days, teachers could hit students with a ruler if they misbehaved in class.
• In certain schools, students must stand when their teacher enters the room.
• Steven wants to go out but his mum said he can’t go until he has finished his homework.
• We need to decide who will be class president.
• I didn’t see Bill today, he must have taken the day off.
• Kate looked pale in the doctor’s office. She might be ill.
• In Britain, all teens have to stay in school until they are 16 years of age.
• You should spend time studying if you want to get good marks.
• “May I leave early today, please?” Sarah asked.