问题

Our school football club twenty boys and twenty girls.
A:a; an
B:an; an
C:an; a
D:a; a;
B:an; an
C:an; a
D:a; a;
正确答案是:
同类题型
It is impossible for ______ little children to do ______ much work within 20 minutes.
This work is _________difficult for us. Weneed _________people.
It’s ________ nice day, isn’t it–Yes, whatfineweather!
_____thirsty I am, I never seem to be able to finish the large bottle of Cola placed before me.[ ]