I think they failed to accomplish the task, ______?
| A．do I | B．don't I | C．did they | D．didn't they |
It is not always easy for the public to see _______ use a new invention can be of to human life.
| A．whose | B．what | C．which | D．that |
_______ that we can't get the necessary equipment, we will have to give up the
experiment.
| A．To assume | B．Assume | C．Assumed | D．Assuming |
Attackers in China’s Xinjiang region crashed two cars into shoppers at a market in May,31 people.
| A．killed | B．to kill |
| C．killing | D．being killed |
-----How dangerous it was !
-----Yes, but for the young man’s quick action, herun over by the car.
| A．should have been | B．would be |
| C．could have been | D．might be |
Chemical pollution will bring about a threat to agriculture and food chain, and
to human health.
| A．frequently | B．significantly |
| C．steadily | D．consequently |