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
Nowadays，few people form the habit of keeping a supply of candles in the house in case of power ________.
A．drop B．lack C．absence D．failure
