阅读理解。

     It' s Sunday morning. There are many people in the park, some boys are playing basketball. There are

some girls under a big tree. They' re singing and dancing. What are those women doing? They are drinking

tea. Look at the woman in a blue coat.  Who' s she?  She' s my mother. She is talking to Edward. Edward

is her student. He is a good student. He studies hard .  He' s good at all the subjects.  And he' s  friendly to

all his teachers and his friends.

1. The boys are _____.

A. singing

B. playing basketball

C. dancing

D. drinking

2. My mother is _____.

A. a teacher

B. an office

C. a doctor

D. a woman

3. Edward is in _____.

A. my home

B. the classroom

C. the zoo

D. the park

4. —Who' s under a big tree? 

    —_____.

A. Some people.

B. Some women.

C. Some girls.

D. Some boys.

5. —What color is my mother' s coat?

    —It's _____.

A. blue

B. white

C. red

D. yellow

粗木醋液澄清时，上层为（），下层为沉淀木焦油。