Beijing Opera is our national opera ________ a history of 200 years.A. about B. with C. at
_______is a pity that he can’t come to my birthday party.
The lovely room might be_________.
Who’s that boy reading in the garden? Is it David?----It______be David. I saw him in the classroom just now.
She _____________ Beijing when she _________.
--- Don’t forget _____________ the door when you leave the classroom.