The old church ___________the first century A.D. is well preserved.A. dates back to B. dated back toC. dating back to D. to date back to
---Could I use your computer for a few minutes, please? --- ________. I’m not using it myself.
It was at 10 o’clock last night __________ the visitors finally arrived at Pudong International Airport.
—How many times have you been to China? —In fact, it is the first time I __________ here.
—I missed the first part of the film. It was really a pity. —You __________ home half an hour earlier.
His father told me that he __________ for the United States three days __________.