The Chinese government has made the Mid-autumn festival a national holiday people will ha

问题补充：

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

A. when

B. which

C. where

D. what

答案：

(答案→)A. when

B. which

C. where

D. what

解析：句意：中国政府让中秋节成为国家节日在这一天允许人们有一天的假期。这里是定语从句，先行词是national holiday，从句中缺少状语，故选A。