— When______ you______ the smart hat?— While my parents were waiting for the plane at the airport.A. did, buy B.do,buy C.were,buying
Where have you been, Ann? You on the phone just now.
He told me that he ________ here for five minutes.
I am waiting for my friend. , I will go swimming alone.
Would you mind me how this physics problem ?
He is so careless that he often his school things at home.