His brother likes ______ history very much. He knows a lot about ______Chinese history, especially ______history of social development.
| A．/; / ; the | B．/ ; the ; / | C．the ; / ; / | D．the ; / ; the |
We ________ jump to conclusions before we have all the facts.
| A．couldn't | B．mightn't | C．shouldn't | D．mustn't |
It was several years ________ I realized ________ David had lied to me.
| A．when; that | B．that; when |
| C．before; that | D．until; why |
The project will help people understand the many threats to the natural environment ________ endangered plants and animals live.
| A．which | B．when | C．where | D．that |
—How do you think I can make up with Johnson?
—Set aside ________ you disagree and try to find ________ you have in common.
| A．what; what | B．where; what |
| C．what; which | D．where; which |
—What do you think of the news in today's newspaper?
—We shouldn't ________ the trouble of helping others only because what we do may invite trouble.
| A．knock off | B．take off |
| C．keep off | D．break off |