根据要求写出下面词的适当形式。

1. —How many  ______ (月份) are there in a year?

    —Twelve.

2. It's Lucy's ______ (女衬衫). It's very new.

3. It's too far away from our school. Let's ______ (乘) a bus to get there.

4. Lucy spends half an hour a day ______ (看) TV.

5. Listen! They are ______ (聊天) with each other in the room.

6. T______ is the third day of a week.

7. Millie isn't pretty, but she is p______, we all like her very much.

8. The windows and the doors are ______ (not open). It's hot (热的) in the room.

9. June 1st is ______ (child) Day. My daughter likes that day best.

10. My Cousin Kitty wants to ______ (be) a teacher like her mother.

生态系统是由什么组成的

A．无机界和生产者

B．生产者和消费者

C．分解者和消费者

D．无机界、分解者、消费者、生产者

E．无机界和分解者