Look!There are the twins. What are they doing? They're sweeping the floor.

Who is that boy? He's Bill. What is he doing? He's cleaning the blackboard.

Look at the girls near the windows. They are cleaning the windows. What are the boys on the chairs doing? They are cleaning the lights.

All the students are working. They are all working very hard.

根据短文内容，选择正确答案

1. The students clean their classroom on________.

A. Monday　　　　　　　　　B. Sunday　　　　　　　　C. Friday

2. The twins are________.

A. cleaning the blackboard

B. cleaning the door

C. sweeping the floor

3. Bill is________.

A. standing near the window

B. sitting on the chair

C. cleaning the blackboard

4. ________are cleaning the windows.

A. The boys　　　　　　　　　　　　 B. The girls　　　　　　　　   C. The children

5. The boys are cleaning________.

A. the desks and chairs

B. the doors

C. the lights