The doctor will not perform the operation______it is absolutely necessary.

admin2011-01-14  41

问题 The doctor will not perform the operation______it is absolutely necessary.

选项 A、so
B、if
C、for
D、unless

答案D

解析
转载请注明原文地址:https://jikaoti.com/ti/5GnYFFFM
0

最新回复(0)