情态动词must/should/shouldn't用法归纳 — 英语填空题
题目
用 must、should 或 shouldn't 填空（每词限用一次）：1. You ___ finish your homework before playing games—it's a rule in our family. 2. He looks ill. He ___ go to see a doctor as soon as possible. 3. You ___ stay up too late before an exam, or you'll feel tired the next day.