问题

It is _______ unusual thing for us to find ________ UFO.
A:a; a
B:an; an
C:a; an
D:an; a ;
B:an; an
C:a; an
D:an; a ;
正确答案是:
同类题型
Who is ____ man in a black hat —It’s Jim Brow . We often play ____ basketball in our free time.
I _____ it be given a fair price fortheir products.
The fire was finally_____ after the building had _____for two hours.[ ]
Elephants have their own way to tell the shape of an object and ________ it is rough or smooth