--Whose shirt is this? Is it Tom’s? ---No, it isn’t, ______ is white.
----Could you take care of our dog while we are away? ----_________.
----Who’s the woman in red ? Is it Mrs. White?----It be her. She went to Beijing yesterday.
----Can you write to me if you are free?----No problem. But _______ is your e-mail address?
----Don't forget to come to our school assembly(集会)tomorrow morning.----I won't. I just now.
The railway _______ Qinghai to Tibet is the longest plateau (高原) railway in the world.