Shanghai is really a modern city now! Many tall buildings ________everywhere.
A. can be seen B. can see
C. should be seen D. should see
How unlucky he was! A car accident ________ to him last week.
A. was happened B. had happened
C. happened D. was happening
Both his parents look sad. Maybe they ________ what happened to him.
A. will know B. knew
C. have known D. had known
—I'm sorry to have kept you waiting.
—Oh, not at all. I ________here only a few minutes.
A. have been B. had been C. was D. will be
Don't bother him. He ________to the weather report. He is leaving for another city.
A. will listen B. is listening
C. listens D. listened
—I ________know you were here. When did you arrive？—At eight o'clock.
A. haven't B. don't C. didn't D. wasn't
