I won't buy this iPhone unless the price to under 2 000 yuan. A. reducesB. will be reduce

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。