3. 解析：选A。考查独立主格结构。故选A。

9.　　　 　

removed the cotton?wool, I was able to tell him of that he had pulled out the wrong tooth.　　　　　　　　　　　　　　　　　 10.　　　

“must+have+done”。故选C。

8.　　　

couldn?t say everything. When the dentist at last

7.　　　

the hole where the tooth had been. I suddenly felt very worried, so

6.　　　

nod or make strange noises. Meanwhile, my tongue was busy search out

5.　　　

In answer to these questions, I could neither

4.　　　

was growing. He then asked me a lot of other question.

3.　　　

bird eggs and asks me whether my collection

2. 　　　

was full with cotton?wool. He knew I collected

此题要求改正所给短文中的错误。对标有题号的每一行作出判断：如无错误，在该行右边横线上画一个勾(√)；如有错误(每行只有一个错误)，则按下列情况改正：

此行多一个词：把多余的词用斜线(＼)划掉，在该行右边横线上写出该词，并也用斜线划掉。

此行缺一个词：在缺词处加一个漏字符号(∧)，在该行右边横线上写出该加的词。

此行错一个词：在错的词下划一横线，在该行右边横线上写出改正后的词。

注意：原行没有错的不要改。

My dentist had just pulled out one of my tooth

1. 　　　

　and had told me to rest for while. My mouth