The wide spread of super hybrid rice around the world ______ the lives of millions and millions of people suffering from hunger to a great level.
| A．has improved | B．is improving | C．improved | D．has been improving |
The volcano erupted violently , yet the village at the foot of it should _________.
| A．come through | B．go through | C．get through | D．pass through |
Although the used car seems in good ____________,it cannot run too fast.
| A．state | B．situation | C．condition | D．occasion |
Try to spend your time just on the things you find_________.
| A．worthing doing them | B．worth being done |
| C．worthy to being done | D．worthy of being done |
The police were seeking more information to find out ______ the rich merchant.
| A．who was it that killed | B．who it was that killed |
| C．it was who killed | D．who was it killed |
Not until he called the secretary three times ______ that the manager went to an important meeting.
| A．did he tell | B．he told | C．was he told | D．he was told |