This is an illness that can result in total blindness______left untreated.

admin2014-10-11  39

问题 This is an illness that can result in total blindness______left untreated.

选项 A、if
B、after
C、since
D、because

答案A

解析 if在这里引导的是条件状语从句,其中省略了it is。故答案为A。
转载请注明原文地址:https://jikaoti.com/ti/sRaYFFFM
0

最新回复(0)