What are they doing?
原因：
此举为特殊疑问句,首先括号中里的词一定不要有.再看they are.一般变化时都将其倒过来再放在疑问词之后最后看seeing friends,seeing为ing形式所以是doing.
they are （seeing friends）.对括号部分提问
4个回答
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