__________ is my book? On the desk.[ ]
A. What
B. Where
C. How
答案：B
对于颌面部损伤病员若不及时处理，会马上造成生命危险的主要原因是（）
A.出血
B.感染
C.休克
D.窒息
E.弥散性血管内凝血（DIC.
You can't sneeze and keep your eyes _______ at the same time.[ ]
A. open
B. opens
C. opened
D. opening
