He made another wonderful discovery , ____ of great importance to science.
| A．which I think is | B．which I think it is |
| C．which I think it | D．I think which is |
“I don't think it's my ________that the TV blew up. I just turned it on，that's all，”said the boy.
| A．error | B．mistake | C．fault | D．duty |
—I’m sorry I stepped outside for a smoke. I was very tired.
—There is no______ for this while you are on duty.
| A．reason | B．excuse | C．cause | D．explanation |
Chinese arts have won the______ of a lot of people outside China.
| A．enjoyment | B．appreciation | C．entertainment | D．reputation |
In dealing with public relations, we should make every effort to prevent the______ in personality.
| A．contact | B．contrast | C．connection | D．conflict |
The environmentalists said wild goats’______ on the vast grasslands was a good indication of the better environment.
| A．escape | B．absence | C．attendance | D．appearance |