_____their students, the famous teacher came into the hall.
| A．Followed | B．Followed by |
| C．Being followed | D．Having been followed |
28. He raised a suggestion at the meeting, ____ well worth considering.
| A．which I think is | B．which I think it is | C．I think is which | D．I think it is |
27. The experiment, _____ to test the theory, will be carried out tomorrow.
A. intendingB. intendedC. to intendD, having intended
26. Would you please speak ____ a loud voice? I didn’t catch what you said, with all the noise going on.
| A．in | B．on | C．of | D．To |
25. Only when I lost the opportunity to take my first job ____ how important it was to me.
A. I realized B. I had realized C, had 
I realized D . did I realize
24. _____ is known to us all is that to work hard to achieve a goal is more important than only to have a goal.
| A．What | B．As | C．it | D．This |