【题目】they / are / what / doing (?)
_____________________________
【答案】What are they doing?
【解析】
they他们,are是,what什么,doing做,根据所给问号,可知句子是疑问句,根据词义连成句子:他们正在做什么?故答案为What are they doing?

【题目】they / are / what / doing (?)
_____________________________
【答案】What are they doing?
【解析】
they他们,are是,what什么,doing做,根据所给问号,可知句子是疑问句,根据词义连成句子:他们正在做什么?故答案为What are they doing?