兴奋 骨碌 折磨 欢乐
高兴 骨头 磨面 乐曲
（答案不唯一）
解剖学成功
A．将插管向输卵管开口处插入0.5cm左右B．探宫腔C．从插管中缓慢注入复方苯酚糊剂D．将外套管及插管放入宫腔，达宫底后滑入宫角E．注入生理盐水8～10ml问输卵管药物粘堵术的步骤
—Look! The man at the gate _______ be our headmaster. He is always standing there every morning.
—No, it _______ be him. He is holding a meeting in the office now. [ ]
A. must, can't
B. must, mustn't
C. can't, can't
D. can't, mustn't
