If we________ , we can realize the progress we have made in space research.
| A．turn back | B．look back | C．answer back | D．move back |
As is well－known，the brain performs a very important ________，which controls the nerve system of the body.
| A．motion | B．action |
| C．function | D．fact |
—What do you think of the project put forward by the Blacks?
—Considering its real ________，it will be well worth putting into practice，I suppose.
| A．reward | B．prize | C．cost | D．value |
The two parties held the talk in a friendly ________ and reached an agreement.
| A．atmosphere | B．state |
| C．situation | D．phenomenon |
We should look up to him as a shining example of ________ to duty.
| A．devotion | B．privilege |
| C．responsibility | D．burden |
Kelly gave me a vivid ________ of her trip to Mount Tai after her return.
| A．explanation | B．account |
| C．imagination | D．idea |