___helen and yang ling go to school on foot every day?用适当的助动词填空.

问题描述:

___helen and yang ling go to school on foot every day?用适当的助动词填空.

Why ___ Helen and Yang Ling go to school on foot every day?用适当的助动词填空.
答案:do
翻译:为什么海伦和杨玲每天都走路去上学?