情态动词用法小结 — 英语词汇题

用 can't, must, should, may 的适当形式填空（每空一词）。1. The li…

参观科学中心时，规则写着：学生不能独自进入实验室；中�…

—___ you help me carry the box? It's too heavy. —Sure, no problem. A. Must B…

根据句意，用括号中适当的情态动词填空：1. You ___ (必须) was…

单项填空：—Mum, ___ I play basketball outside now? —I'm afraid not. You…

Drivers ___ stop when the traffic lights are red. A. can B. must C. may D. needn…