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20. But for the help of my teacher, I    the first prize in the Competition.

   A. would not have won  B. had not won  C. would have won    D. have won

試題詳情

19. So sudden      that the enemy      no time to escape.

   A. did the attack; had                   B. was the attack; had had

   C. was the attack; had                   D. did the attack; had had

試題詳情

18.   twice, the postman refused to deliver our letters unless we chained our dog.

   A. Being bitten       B. Bitten           C. Having bitten      D. To be bitten

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