阅读短文，判断对(√)错(×)。

      I am a girl. My name is Jenny. I am fifteen. I am a student, I like to play with my ball. In the morning, I go

to school. In the afternoon, I finish school at three-thirty. I walk home. After supper, I do my homework.

( ) 1. Jenny is twenty-five.

( ) 2. Jenny likes to play with her doll.

( ) 3. In the morning, Jenny does her homework.

( ) 4. Jenny finishes school at three-thirty.

读“我国某一高原景观图”，回答问题。

小题1:该地区房屋的建筑形式主要是（ ）

A．砖墙斜顶房

B．窑洞

C．土墙平顶屋

D．晾房小题2:该高原最严峻的环境问题是（ ）

A．水土流失

B．环境污染

C．生物灭绝

D．酸雨危害小题3:治理这一环境问题的主要生物措施是（ ）

A．深耕改土

B．修筑梯田

C．植树种草

D．平整土地小题4:图示所在地区农作物的熟制主要是（ ）

A．一年一熟

B．一年两熟或一年三熟

C．一年三熟

D．两年三熟或一年两熟