When Mary came, I _____ on the piano.
A. is playing B. plays C. was playing D. played
Cars, buses and bikes ________ stop when the traffic lights turn red.
A. can B. may C. must D. need
_______ we got to the station, the train had left already.
A. If B. Unless C. Since D. When
Tom kept quiet about the accident _____ lose his job.
A. in not order to B. in order not to
C. in order to not D. not in order to
He is very old, ______ he still works very hard.
A. but B. if C. when D. as
I rang you several times yesterday but couldn’t ______.
A. get on B. get down C. get through D. get to
