You'd better not _______ school again. Miss Liu is very angry with you. [ ]

A. to be late for

B. be late at

C. to be late at

D. be late for

麻醉期间引起分泌物过多的因素（）

A.术前药未给抗胆碱药或用量不足

B.麻醉过浅

C.反复刺激咽喉

D.缺氧与二氧化碳蓄积

E.使用吸入麻醉药