翻譯以下短語并完成句子。
1. watch for _____
2. watch out ( for)____
3. He is  _____  a better chance. 他正在等待更好的機會.
4. Will you____my clothes while I have a swim?
     我去游泳,你幫我看一下衣服好嗎?
5. It's fantastic to swim in the sea, but you have to ____ sharks.
     在海里游泳真是太爽了,但是,你必須要小心鯊魚.