There is no doubt that by recycling textbooks, the cost of books will be __________ greatly.
| A．increased |
| B．gathered |
| C．collected |
| D．reduced |
People are talking about the new playin two weeks.
| A．to be put on | B．being put on |
| C．put on | D．puts on |
Old-fashioned phones matter when wireless networks __________ in disasters.
| A．break out | B．break up |
| C．break in | D．break down |
The streets are all dry. It _____ during the night.
| A．must have rained | B．should have rained |
| C．can’t have rained | D．couldn’t rain |
I would have gone to my cousin’s birthday party last night, but I was not.
| A．available | B．accessible |
| C．acceptable | D．adequate |
--I am sure Mary will win the first place in the coming competition.
--I think so. She ________ for it for months.
| A．has prepared | B．has been preparing |
| C．had prepared | D．prepared |