When and where this took place _____ still unknown.
A. is B. has
C. were D. are
Life teaches us not to regret over yesterday, for it ________ and is beyond our control.
A. passed B. will pass
C. has passed D. had passed
— How do you like the trip to Tai Wan?
— We _____ there for a week. It’s a fantastic place and well worth visiting again.
A. had stayed B. have stayed
C. stayed D. will stay
—The zookeeper was really annoyed with me.
—How could he have been if you______stones at the animals?
A. didn’t throwB. don’t throw
C. hadn’t thrownD. haven’t thrown
After the argument Colin ran away and______since.
A. Isn’t heard of B. wasn’t heard of
C. hasn’t been heard of D. hadn’t been heard of
—Our uncle will be here to attend a meeting tomorrow, you know?
—Oh, I thought that he _____ today.
A. is coming B. comes
C. was coming D. will come
