What ____ the teachers doing?They are working (work) in the office now.咋填?

问题描述:

What ____ the teachers doing?They are working (work) in the office now.咋填?

are,前边一句是问句.有现在进行时的be动词存在,主语是teachers(老师们),所以是第三人称复数,所以用are.