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

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。第一空是固定词组paly a trick on=play tricks on作弄…；欺骗；第二空后的名词fun是一个不可数名词，have fun玩的开心；句意：在大部分西方国家，在愚人节这一天，人们经常相互捉捉弄，尤其是孩子玩得非常开心。故D正确。