问题
选择题
I won't 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
答案：D
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。