题目内容

Americans are not taught, as people in many Asian countries are, that they should mask their emotional responses. Their words, the tone of their voices, or their facial expressions will usually reveal when they are feeling angry, unhappy, confused, or happy and content. They do not think it improper to display these feelings, at least within limits.

A. reveal
B. hide
C. make
D. display

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In their efforts to use their time wisely, Americans are sometimes seen by foreign visitors as automatons, unhuman creatures who are so tied to their clocks and their schedules that they cannot participate in or enjoy the human interactions that are the truly important things in life. "They are like little machines running around," one foreign visitor said.

A. efforts
B. interactions
C. human beings
D. machines

There is little evidence to substantiate this theory though, by the same token, there is little to disprove it.

A. disprove
B. present
C. propose
D. support

The source of the red is widely known: it is created by anthocyanins, water-soluble plant pigments reflecting the red to blue range of the visible spectrum. They belong to a class of sugar-based chemical compounds also known as flavonoids.

A. plant pigments
B. chemical compounds
C. various blue colours
D. different red colours

After the fire, the entire office was restricted, that is, only a few people could enter, for several days.

A. torn down
B. closed to the public
C. under repair
D. badly damaged

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