观察一下，哪条线段是圆的半径。（   ）

完形填空

    Look! There  1many kites in the2．They are red，yellow and blue．I like 3kites 4 much．But I can't fly very5．My brother Peter can do6 well．He often 7me fly kites．We go out8our kites every Sunday．9my brother's help，now I can fly10．

    This is our nice 1. In our school, there2twenty classrooms. 3every classroom, there is a TV 4 some computers. 5 to the classrooms, you can see two beautiful 6. The students like reading 7and magazines there. There are six science labs in our school,8.We can have science lessons there. Oh, look! Some students are playing games in the 9. After school, let's 10 tennis there.