题目内容

All passengers ________ go through safety check before they take a plane.

A. can
B. may
C. must
D. could

查看答案

搜索结果不匹配？点我反馈

更多问题

---______ I wear a tie to jenny's birthday party.---No, you needn’t. But do remember to bring her a present.

A. Must
B. Should
C. Need
D. Can

---Life is becoming convenient with the internet.---That's true. Almost everything _______ be done online.

A. must
B. could
C. should
D. can't

Shall we meet at the station at 9 am?In fact we __. The train_ until 11 am.

A. needn't; will leave
B. needn't; won't leave
C. mustn't; leaves
D. mustn't; doesn't leave

圈卡适用于下列哪种情况

A. Ⅰ类导线的牙冠
B. Ⅲ类导线的牙冠
C. 孤立牙
D. 远中孤立且有颊舌向倾斜的磨牙
E. 游离缺失的末端基牙