Question

The ambulance was just arriving, for a worker, who ______ the window on the second floor, fell off the window.

1. A.
   had been repairing
2. B.
   was repairing
3. C.
   has been repairing
4. D.
   would be repairing

Answer 1

A
考查時(shí)態(tài)。由題干可知救護(hù)車的到來用了過去時(shí)，這位工人修窗戶是在救護(hù)車到來之前，那么應(yīng)該使用過去完成時(shí)，為了強(qiáng)調(diào)動(dòng)作一直在發(fā)生，所以又用了過去完成進(jìn)行時(shí)。