．— you got to know where I was yesterday?
—Through a student.
| A．Where was it that | B．When was it that |
| C．How was it that | D．Was it how that |
______ the call for help, the boys immediately rushed out to see what was going on.
| A．In order to hear | B．Hearing | C．Having heard | D．They heard |
______ their life in the past, ours is much better.
| A．Comparing with | B．Compared with | C．To compare with | D．Comparing to |
The soldiers ran as fast as they could, ______ to catch the fleeing enemies.
| A．hoping | B．to hope | C．they hoped | D．hoped |
______ for half a month, the town was running out of food and clothing.
| A．Having flooded | B．As the town had flooded |
| C．Having been flooded | D．To have been flooded |
_______ for the coming examinations before, I have no time for the film.
| A．Not preparing | B．To prepare |
| C．Having not prepared | D．Not having prepared |