发生在纵隔的畸胎瘤多位于
A．前纵隔
B．后纵隔
C．中纵隔
D．中、后纵隔
E．纵隔各部分发生率均等
参考答案：A
28. As far as I know, this man ____ risk anything than lose the ring for his wife.
A．would rather
B．had better
C．preferred
D．would like to
