小明在海边游泳时发现，同样在烈日下，沙滩很热，而海水却比较凉，这是为什么？小明感

请仔细阅读四段话，从A、B、C、D中找出对应的小标题，并回答第5小题。
小题1:No one wins all the time. Learn from the times that you lose. All great champions were once losers at some point. But, they learned. And they kept a positive attitude until they got better.
小题2:Your happiness is up to you. Many people forget this. Truly successful people choose happiness no matter what their present situations are.
小题3:Chances lie in what you do every day. You do the same work. You eat the same foods. You wear the same clothes. Try a new way. Take a new path. Even talk to someone new.
小题4:Opportunity is everywhere. Even the worst situations have opportunities. Seize (抓住) the opportunity, and seize the time. That's the secret of success.

A. Choose to Be Happy          B. Do Something New C. Look for the Opportunity       D. Learn from Losing

小题5:The material above tells us the ways to ________.

A．find a good job	B．live a positive life
C．protect the environment	D．keep us healthy