they speak english and chinese?(对they划线部分进行提问)

问题描述:

they speak english and chinese?(对they划线部分进行提问)
and用不用改成or呢?and不是用于肯定句,而or用在否定句和疑问句吧?有那位老师能给个准确答案呢、、

Who speak chinese and english? 保证正确!