情态动词 must/should 表义务 — 英语词汇题
题目
根据句意和首字母提示，补全句中表示义务的情态动词（每空一词）。1. You m____ stop and look both ways before you cross the road. 2. We s____ wash our hands before dinner. 3. Students m____ not play with fire at school. 4. You s____ be careful when you ride a bike in the rain.