根据无牙颌各部分组织结构特点及与全口义齿的关系,无牙颌被分为以四区,除了()。
A.主承托区
B.副承托区
C.边缘封闭区
D.后堤区
E.缓冲区
参考答案:D
So badly ______ in the car accident that he had to stay in hospital for several months.[ ]
A. did he injure
B. injured him
C. was he injured
D. he was injured