阅读理解 Children in the USA like K Day very much. K is for kites. March 7 is the day. On that day lots of children go out in the open air. They take their kites with them. Some kites are very big. Others are small. They are in different colours. Every kite has a long string(细绳). To get the kites up, the children begin to run. They let out the string from the ball in their hands. Now the kites are flying in the air. How nice they look! Now all of the kites are high up in the air. Some are higher than others. The one like a bird is the highest. But what's wrong?  It's flying away! The string is broken. Another kite gets away. And more kites fly away. But the children are running after them. They want to get them back. People are watching them and laughing. 1. On __________ lots of children go out in the open air. A. May Day B. June 1 C. March 7 D. April 7 2. Kites are in __________ colours. A. same B. different C. white D. black 3. __________ kites are flying away. A. one B. two C. three D. some 4. The one like a bird is __________. A. the biggest of all B. the smallest of all C. the highest than others D. the highest of all 5. This story is mainly about __________. A. the kites B. K Day in the USA C. children in the USA D. flying the kites