—Hurry up！Alice and Sue are waiting for you at the school gate.
—Oh！I thought they ________ without me.
A．went B．are going
C．have gone D．had gone
We arrived at work in the morning and found that somebody ________ into the office during the night.(2011·江西)
A．broke B．had broken
C．has broken D．was breaking
By the time Jack returned home from England，his son ________ from college.(2011·辽宁)
A．graduated B．has graduated
C．had been graduating D．had graduated
In the last few years thousands of films ________ all over the world.
A．have produced B．have been produced
C．are producing D．are being produced
— Alvin，are you coming with us?
—I'd love to，but something unexpected ________.
A．has come up B．was coming up
C．had come up D．would come up
—I remember you were a talented pianist at college.Can you play the piano for me?
—Sorry，I ________ the piano for years.(2012·湖南)
A．don't play B．wasn't playing
C．haven't played D．hadn't played
