阅读理解。

     I am a Chinese boy. My name is Li Lei. I am twelve. My sister's name is Li Mei. She's

fourteen.'Li Mei and I are students. We like school.

     My mother is a teacher. She teaches English. My father is a policeman (警察). My young

brother's name is Li Hong. He is only four. We all like him.

1. Li Lei is _______.

A. Chinese

B. English .

C. American

2. Li Lei's sister is _______.

A. four

B. twelve

C. fourteen

3. Li Lei's mother and father are_______.

A. student and teacher

B. teacher and policeman

C. all teacher

4._______ like school.

A. Li Mei and Li Lei

B. Li Mei and his mother

C. Li Lei and his father

5. How many brothers does Li Lei have?

A. Three.

B. Two.

C. One.

将市场预测分为短期预测、中期预测和长期预测，是按( )的不同划分的。

A．预测范围

B．预测商品综合程度

C．预测性质

D．预测期限