题目内容：

用不定冠词a或an填空。

1.This is ____ orange. That is a banana.

2.—What's this?

—It's____ quilt.

—What's that?

—It's ____ map.

3.—Is this __ English book?

—No, it's ____ Chinese book.

4.—What's this in English?

—It's____ jacket.

5.—Is this ____ apple?

—No, it's ____ pear.

6.That is____ pen.

7.Here is ____ key.

8.There is_____ “e” in the word “orange”．

9.There is____ “h” in the word “how”．

10.There is ____“g” in the word “good”．