—Would you mind giving your advice on how to improve our efficiency?
—If you make _____ most of forty-five minutes classes day after day, there will be _____ switch in grades.
| A．/; / | B．the; a | C．/; a | D．the; / |
I ________ up to $5 000 by the time the new term begins in September.
| A．have saved | B．will have saved |
| C．will be saving | D．had saved |
—What happened to Bill?
—He ________ really fast when suddenly he ran into a parked car.
| A．had run | B．was running |
| C．has run | D．has been running |
I thought the teacher would say something about our exam result but he ________ it.
| A．doesn't mention | B．hasn't mentioned |
| C．wouldn't mention | D．didn't mention |
—When are you leaving for Chicago?
—As soon as we ________ the project.
| A．are completing | B．completed |
| C．will complete | D．complete |
She is a wellknown doctor now, but she ________ as a cleaner at the hospital for five years.
| A．has worked | B．worked |
| C．had worked | D．works |