He has two basketballs. One is new, ___________ is old.
—Look! That man looks like Mr. Brown.—-It _______be him, for he _____to America.
— Did you watch the opening ceremony (开幕式) of the Nanjing YOG?— Yeah. It was _____on CCTV and Jiangsu TV.
— Why didn’t you go to the cinema with John last night?—_____I had lots of homework to finish.
—Do you know Robert? —Yes, He is__ university student. He likes sports and runs for ___ hour every morning. A a; a B a; an C an; an D an; a
They stayed in Beijing for a few days and visited some ________.