It is known to all that every minute ____ full use of____ the lessons will benefit students a great deal．
| A．which makes; studying | B．when made; to study |
| C．that made; to study | D．which is made; studying |
You ________ to leave until you _______ your work.
| A．won’t be allowed; have finished | B．won’t allow; finish |
| C．won’t be allowed; will finish | D．won’t allow; will finish |
―________ you _________ the chief editor at the airport?
―No. He _______ away before my arrival.
| A．Have; met; has driven | B．Had; met; was driven |
| C．Did; meet; had been driven | D．Have; met; was driven |
―Did you meet Professor Johnson?
―Yes, but when I arrived, he ________, so we only had time for a few words.
| A．had just left | B．has just left |
| C．was just leaving | D．just left |
―Have you finished your composition already?
―Yes. I _________ it in twenty minutes.
| A．have finished | B．finished |
| C．will finish | D．had finished |
He traveled to many mountain villages and saw many poor children out of school. This experience _______ his life.
| A．would change | B．had changed |
| C．was to change | D．was changing |