What’s this ? A. in englishB. In EnglishC. in an EnglishD. in English

问题补充：

What’s this ?

A. in english

B. In English

C. in an English

D. in English

答案：

A. in english

B. In English

C. in an English

(答案→)D. in English

解析：in某种语言用介词in直接加语言，语言第一个字母需大写，in无需大些，故本题选D。