题目内容

---______ 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

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---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

下颌近中舌侧倾斜的末端孤立牙设置圈卡时，卡环臂尖位于基牙的

A. 基牙近中缺隙侧邻面
B. 基牙舌侧近中倒凹区
C. 基牙颊侧近中倒凹区
D. 基牙远中邻面
E. 基牙舌侧远中倒凹区