阅读短文，选出正确答案，并将其序号填入括号内。 
This is our classroom. It’s a nice and big room. The walls are white and the windows are big. There are two doors in the room. 
There are four rows of desks and chairs in it. There are ten desks and chairs in every row. 
There is a big blackboard in the room, too. We have a map of China in our classroom. It’s on the wall near the blackboard. We have a clock. It is over(在……上方) the blackboard. The teacher’s desk is near the blackboard, too. There are some flowers on the windows. And behind the front(前面的) door there are three brooms. In the room there are seven lights. 
Our bags are behind our chairs. There are some books and school things on our desks. We like our classroom very much. 
（1）Our classroom is ________________.
A. an old one    B. a new one    C. very small    D. very big 
（2）There are ______________ students in our class.
A. forty        B. twenty       C. thirty        D. fifty 
（3）Our clock is _______________.
A. on the wall behind the room    B. over the blackboard
C. on the teacher’s desk          D. behind the front door 
（4）There are some _____________ and __________ on our desks. 
A. apples; books                B. books; pencils
C. books; school things          D. flowers; lights 
（5）How many lights are there in the classroom? ________.
A. There are seven  B. It’s seven   C. Six     D. Eight