There is “u” and “s” in the word “use”.A. a; a B. an;aC. an; anD. a; an

问题补充：

There is “u” and “s” in the word “use”.

A. a; a

B. an;a

C. an; an

D. a; an

答案：

A. a; a

B. an;a

C. an; an

(答案→)D. a; an

解析：字母u的词首音素是辅音，故不定冠词用a。字母s的词首音素是元音，故不定冠词用an，选D。