情态动词 must/mustn't 表义务 — 英语词汇题
题目
根据句意，用 must 或 mustn't 填空（每空一词），并写出所填词的中文意思。1. Your puppy is thirsty. You ______ give it some clean water. 中文意思：______ 2. You ______ touch your hamster roughly. It may get hurt. 中文意思：______ 3. It is late. Ben ______ walk his dog in the park before it closes. 中文意思：______