This is armchair. I’m writing with armchair.A. a; aB. an; theC. a; theD. the; an

问题补充：

This is armchair. I’m writing with armchair.

A. a; a

B. an; the

C. a; the

D. the; an

答案：

A. a; a

(答案→)B. an; the

C. a; the

D. the; an

解析：B 泛指一个用冠词a/ an，armchair首字母发音是元音，故用冠词an；特指用定冠词the，故选B。