The cars run (slowly) when there is a traffic jam.括号内提问

题目

The cars run (slowly) when there is a traffic jam.括号内提问
____ _____ the cars rum when there is a traffic jam?

答案

空格处填 How do
The cars run (slowly) when there is a traffic jam.提问
--【How do】the cars run when there is a traffic jam?