Air pollution is caused by many things. Great clouds of smoke come from factories. Cars send smoke and fumes into the air. Burning waste fills the air with bits of dirt. Even burning leaves add smoke to the air. Sometimes, planes cannot find their landing spots through smoke. Smoke of all kinds is bad to breathe and can do great harm to the body.
Still, we cannot live without air. We must find a way to clean the air we have.
In time, we may have factories that are run by atomic energy. Our cars may run on smoke-free electric power. Scientists are also working on new ways to help the oil burned by cars from making fumes. Waste may be burned in the sand on ocean floors.
These changes might keep our air clean in the years to come. But until then, many scientists are looking for ways to make air cleaner now.

Scientists are now working on ways to ______.

A. keep planes from :flying
B. bury sand on ocean floors
C. stop air pollution
D. burn leaves without smoke

作文（50分）

亲爱的同学，十年后的呢，回事啥样？能否成为最好的自己？去问问你的人生际遇，兴趣爱好，更要去问问你的青春志向，和你为之付出的青春汗水……

请从下面的两道作文题中，任选一题，完成作文。

题一：以“十年后，与最好的自己相遇”为题，写一篇作文。

题二：以“致十年后的自己”为题，写一封信。

要求：（1）文中不能出现真实的人名、校名和地名，一经查实，酌情扣分。写信一律称自己未“宁宁”。

（2）除诗歌外，文体不限，字数在600字以上。

（3）选择题二，要符合书信格式。