What is he waiting for?为什么用is不用does
What is he waiting for?为什么用is不用does
He is waiting at the bus stop?为什么用at,不用for?
She is waiting (at) the airport为什么不用waiting for
what is Ben waiting for为什么用what
what does it mean?为什么用does而不用is
Where does he live?为什么用does 不用is
___ is he waiting for
Is he sitting on a football?为什么不用does he
whom is he waiting for还是who is he waiting
what time does the shcool begin?为什么用does而不用is?
does he have a wide mouth 为什么要用does,不用is
Does he jump high?为什么这里用Does/而不用Is?