A. Bartered foods B. Fiat money
C. Coin currency D. Intangible forms
63. The author mentions food，tools and precious metals and stones together because they are all ________.
A. useful items B. articles of value
C. difficult things to obtain D. material objects
64. According to the passage，coins once had real value as currency because they ______.
A. represented a great improvement over barter B. permitted easy transportation of wealth
C. were made of precious metals D. could become collector‘s items
65. Which of the following statements about computerized monetary systems is NOT supported by the passage？
A. They promote international trade.
B. They allow very rapid money transfers.
C. They are still limited to small transactions （交易）。
D. They are dependent on good telecommunications systems.
Passage Two
At the University of Kansas art museum，scientists tested the effect of different colored walls on two groups of visitors to an exhibit of paintings. For the first group the room was painted white；for the second，dark brown. Movement of each group was followed by an electrical equipment under the carpet. The experiment showed that those who entered the dark brown walked more quickly，covered more area，and spent less time in the room than people in the white one. Dark brown made people more active，but the activity ended sooner. Not only the choice of colors but also the general appearance of a room affects those inside. Another experiment presented people with photographs of faces whose energy was to be commented. Three groups of people were used；each was shown the same photos，but each group was in an ordinary room-a nice office. The third was in a tastefully designed living room with carpeting. Results showed that the people in the beautiful room tend to give higher marks to the faces than those in the ugly room did. Other studies that students do better on tests taken in comfortable room than in ordinary-looking or ugly rooms.
66. Which of the following is the best expression of the main idea of this passage？
A. People in beautiful rooms tend to give higher marks to photos of faces than people in ugly rooms
B. The color and general appearance of a room have a deeper effect on the behavior of the people in it
C. The University of Kansas has studied the effects of the color of room on people‘s behavior
D. Beautifully furnished，light-coloured rooms make people more comfortable than ugly，dark rooms 67. According to the passage，we may conclude that the whiter a room is ________.
A. the longer people like to stay in it B. the sooner people in it will leave
C. the more active people in it will become D. the more excited people
68. What is referred to as the general appearance in this passage is ________.
A. how many broad windows a room has，through which sunlight might come in
B. the size of a room
C. whether there are beautiful walls in a room
D. what the room looks like
69. This passage provides us with _______.
A. a piece of scientific information B. a normal lessonliuxuepaper.com