A lot of exercise is good for your health.(译：大量的锻炼对你的身体有好处.）
for your health 在此作状语成份吗?能否写成For your health ,a lot of exercise is good?
Eye exercises are important to students.(译:眼操对学生来说是重要的.)
to students 在此作状语成份吗?能否改写成:Eye exercises are important for students.