They are talking on the phone.对on the phone 提问______ are they _____
问题描述：
They are talking on the phone.
对on the phone 提问
______ are they _____
答
They are talking on the phone.他们在打电话。
______ are they _____ ?
答案：How talking
对talking on the phone 提问：
答案：What are they doing?
答
where are they talking
答
how are they talking