问题补充:
I won buy this iPhone unless the price to under 2,000 yuan.
A. reduces
B. will be reduced
C. has reduced
D. is reduced
答案:
A. reduces
B. will be reduced
C. has reduced
(答案→)D. is reduced
解析:D 考察动词时态语态。条件状语从句中通常使用一般现在时代替一般将来时,根据句义the price与reduce之间存在被动关系,故使用一般现在时的被动语态。