问题补充：
单选题Last weekend, my family ________ kites in the Century Park．A.fliedB.friedC.flewD.flowed
答案：
C解析fly kites意思是“放风筝”。在动词变形时，fly和flow这两个单词，容易发生混淆。fly(vi．/vt．)飞，放飞fly，flew，flown，flyingflow(vi．)流动flow，flowed，flowed，flowingA narrow stream flowed down the mountain,twisting and turning on its way．
