用am, is或are填空

1. —What____your name?

    —My name____Linda.

2. —Hello! How____you?  

    —I____fine, thanks.

3. —What____ this in English?

    —It____a ruler.

    —What color____it?

    —It____green.

4. His name____ Bob.

5. Her first name____Jenny.

6. I____Mary. What____your name?

7. I____an English teacher.

8. You____my good friend.

9. We       in Class 1．Grade 7．

节后胆碱能神经兴奋时，其末梢释放的递质是

A．肾上腺素
B．多巴胺
C．去甲肾上腺素
D．5-羟色胺
E．乙酰胆碱