— What can ____ (he, she) do?
— She can fly.
为解决老百姓看病贵的问题，对某种原价为400元的药品进行连续两次降价，降价后的价格为256元，设每次降价的百分率为x，则依题意列方程为：____．
请写出下列反应的文字表达式，并判断反应的基本类型：
Don't be ____ (暴露于) to the strong sunlight, which may damage your skin.
Could you please pay ____ ____?
