In most western countries on April Fool’s Day people often play trick on each other；childr

问题补充：

In most western countries on April Fool’s Day，people often play trick on each other；children especially have great fun.

A. a；a

B. the；the

C. /；a

D. a；/

答案：

A. a；a

B. the；the

C. /；a

(答案→)D. a；/

解析：考查冠词。play a trick on欺骗；fun作名词为不可数名词，故选D。