If _____ to look after luggage for someone else, inform the police at once.
A. askedB. to askC. askingD. having asked
—It is the first time that I ________ here in Hong Kong.
—What great changes！It’s ten years since I ________here last time.
A．have been；came B．have been；have come
C．am；came D．was；have been
His report was so exciting that it was __ interrupted by applause（掌声）.
A. constantly B. constant C. seldom D. never
The thief was about to leave the room when the police ______ and caught him.
A. got up B. turned up C. kept up D. made up
He was very busy yesterday, otherwise he ____ to the meeting.
A. would come B. came C. would have come D. had come
Sometimes our opinions differ _________ what we choose to observe and how we deal with what we’ve observed
A. whichB. sinceC. becauseD. because of
