you must not read()the sun.it is bad()your eyes

正确答案为：
You must not read (in ) the sun.It is bad (for) your eyes.
之所以用in,是因为整个人都在阳光里面,所以要用in
it is bad for sb 固定句型,对某人不好
翻译为：
你一定不能在阳光下读书.它对你眼睛不好.