完型填空
从A、B、C、D四个选项中，选出可以填入空白处的最佳选项。
One windy spring day, I observed young people having fun using the wind to fly their kites. Multicolored 21 of various shapes and sizes filled the bright sky like beautiful birds darting(飞奔) and 22 . As the strong wind blew against the kites, a 23 kept them under control.
Instead of blowing away with the wind they arose 24 it to achieve great 25 . They shook and pulled, 26 the control string and the long tail 27 them in tow(牵引), facing upward and against the wind. As the kites 28 and trembled against the string, they seemed to say, “Let me go! Let me go!
