Although he knew little about the large amount of work done in the field, he succeeded ________ other more well - informed experimenters failed.
| A．which | B．that | C．what | D．where |
Don’t talk about such things _______ you are not sure about.
| A．which | B．that | C．as | D．what |
Hurry! The train _______. You know it _____at 8:30am. .
| A．leaves; leaves | B．is leaving; leaves |
| C．leaves; leaving | D．is leaving; is leaving |
With the help of high technology, more and more substances _________ in the past years.
| A．discovered | B．have discovered |
| C．had been discovered | D．have been discovered |
Jim is the only one of the policemen in his office who __________ the award.
| A．have won | B．win | C．has won | D．was to win |
The company the girl used to work ________ was shut down last month.
| A．for that | B．for | C．for whom | D．/ |