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
—Mum, I think I'm ________to get back to school.
—Not really, my dear. You'd better stay at home for another day.
A. so well B. so good
C. well enough D. good enough
You can ________ stay at home ________go out to play. It doesn't matter.
A. either, or B. neither, nor
C. both, and D. not only, but also
