________ hard all day, I went to bed at 8 o’clock.
A. Having workedB. Working
C. To workD. To have worked
Don’t call me at the office ________ it is necessary.
A. beforeB. unlessC. althoughD. till
—Did you see Harry just now?
—No, I ________ computer games.
A. have playedB. am playingC. had playedD. was playing
—Have you heard any news about Sarah?
—Yes, she was promoted to president of her company, ________ surprised everyone.
A. whoB. thatC. whichD. it
He found it difficult to read, ________ he had a problem with his eyesight.
A. butB. forC. orD. so
You ________ write the poem down. Our teacher will give us a copy soon.
A. mustn’tB. can’tC. shouldn’tD. needn’t
