Furthermore,students have to pay postage to send letters,something the students might be___
| A．unwilling to |
| B．unwilling to do |
| C．unwilling to be done |
| D．unwillingly |
26.—Flight MU257 _______________ . I must be off now.
—Have a nice trip.
| A．is being announced | B．has announced |
| C．was announcing | D．had been announced |
25. When _______________ comes to saving energy, big changes start with small steps, like turning off the lights.
| A．that | B．this | C．it | D．One |
24. Of the two cameras, I would prefer _______________ one, which is very easy for me to carry.
| A．a smaller | B．the smallest | C．a small | D．the smaller |
23. Mr Jones, a professor, ___________ for his excellent lectures, is popular with his students.
| A．known | B．knowing | C．to be known | D．having known |
22.—Can you give some advice on what I said just now?
—Sorry. My mind______________.
| A．is wandering | B．was wandering |
| C．has wandered | D．had wandered |