——It was the drug，not the disease，that killed the boy.
——He would be still alive today if he ________ that drug.
| A．not take | B．shouldn’t have taken |
| C．didn’t take | D．hadn’t taken |
We have been excavating layers of ash almost six metres thick, which suggests that they the fire burning all winter.
| A．should keep | B．might have kept | C．should have kept | D．might keep |
Only in 1996 the determination and patience of the scientistswith a breakthrough at last .
| A．were ; paid off | B．did; pay back | C．did ; pay off | D．did ; pay for |
Mr Smith was madeheadmaster of our school bymajority of 300 votes.
| A．the ; a | B．the ; the | C． / ; a | D．a ; the |
—Would she mind playing against her former teammates?
— . She is willing to play against any tough players.
| A．I think so | B．I’m not surprised | C．Of course | D．Not likely |
--Where is your father?
--He to Australia on business.
| A．has been | B．went | C．has gone | D．will go |