讲解文本：
cross the bridge when you come to it 船到桥头自然直 Don't worry. We'll cross that bridge when we come to it. 别担心，船到桥头自然直。 Work hard now and you will cross the bridge when you come to it. 现在就好好努力，到时候一定车到山前必有路。
疯狂练习吧！
