They are _singing_ in the room(对划线部分提问) My favourite subject is _math_ (对划线的句子提问)

问题描述:

They are _singing_ in the room(对划线部分提问) My favourite subject is _math_ (对划线的句子提问)

what are they doing in the room?
what are your favourite subject?

what are they doing in the room?
what's your favouriate subject?

What are they doing in the room.
What's your favourite subject