情态动词表建议与许可 — 英语填空题
题目
从括号中选择正确的情态动词填空（每词限用一次）：You look tired, so you ___ (may / should) take a rest. If you finish your homework early, you ___ (should / may) watch TV for a while, because Mum says it is allowed. But you ___ (mustn't / may) stay up too late, for it is not permitted on school nights.