One windy spring day, I observed young people having fun using the wind to fly their kites. Multicolored kites of various shapes and sizes filled the skies __1__ beautiful birds dancing. __2__ the strong winds blew against the kites, a string kept them in check(在控制中)．
Instead of blowing away with the wind, __3__ rose against it to achieve great heights. They shook and pulled, but the restraining (限制的) string and __4__ heavy tail kept them in check, facing upward and against the wind. As the kites struggled and trembled against the string, they seemed to say,
