题目内容：

用冠词a/ an或Be动词（am / is / are ）填空。

1.What’s this in English ?  It’s ________ pen.

2.Is that _________ orange?  No, it isn’t.

3.It is ________ ruler.

4.This is ________ key.

5.Frank ________ OK.

6.Eric  and Dave________ good friends.

7.What _______these?

8.How ________ your father?

9.I ________ a boy.

10.You ________ good.