短信预约提醒成功
推荐辅导班型:环球网校自考保过班全新上线 不过免费重修|自考英语签约保过套餐热招
[2007.04]If the operation ________ carefully prepared,it would not have been successful.
A.was not
B.has not been
C.had not been
D.were not
正确答案:C
答案解析:本题考查虚拟语气。主句是对过去的虚拟,所以根据句意,条件状语从句也应该是对过去的虚拟,所以用had done的形式。句意:如果手术没有经过认真仔细的准备,它就不会成功。
编辑推荐: