题一：
—I’m so sorry. But I _________ my homework.
A. had done B. was doing C. would do D. am doin g
The water supply ha s been cut off temporarily because the workers _______ one of the main pipes.
A. had repaired B. have repaired C. repaired D. are repairing
题三：
I ________ to visit you later that day, but I had to phone and cancel.
A. come B. came C. am coming D. was coming
We ________ very early so we packed the night before.
A. leave B. had left C. were leaving D. have left
The girl has a great interest in sport and ______ badminton classes twice a week over the last three y ears.
A. took B. is taking C. takes D. has been taking
