The Chinese government has made the Mid-autumn Festival a level holiday people will have

问题补充：

The Chinese government has made the Mid-autumn Festival a level holiday, people will have a day off.

A. when

B. which

C. where

D. since

答案：

(答案→)A. when

B. which

C. where

D. since

解析：

这题考查非限制性定语从句，先行词是a holiday，而且定语从句中缺少时间状语，所以用我很，句意是：中国政府使中国成为统一的假期，这时人们可以放一天假。选A。