We sell T-shirts in red for only 20 dollars.(对划线部分提问T-shirts in red)

题目

We sell T-shirts in red for only 20 dollars.(对划线部分提问T-shirts in red)
＿＿＿＿　＿＿＿＿　you　＿＿＿＿for　only　20　dollars?

答案

What do sell