问题
English is ________ useful language so that most people speak it as ________ second language.
A:a; the
B:an; the
C:an; a
D:a; a
B:an; the
C:an; a
D:a; a
正确答案是：
同类题型
Excuse me, does Mr. Zhang’s son live here? —He________ be here, but he has moved?
It was with great courage ______ the boy told the truth _______ he had stolen the money.
Have you finished your work yet? —No, not yet. I think it’ll take _____ ten minutes.