---____ will your father come back from Beijing? ---In two days.
—_______Lucy come from America ? —No. She _____from America. She is English.
The music ________, I want to listen again.
Why ______ she like history? —Because ________ interesting.
I really don’t know ___________________.
The sentence structure(结构)of “Teachers ask me to finish the homework on time” is ____________.