In 1890 he proposed that evolution was irreversible: that “an organism is unable to return, even partially, to a previous stage already realised in the ranks of its ancestors.
A. that can not be undone
B. that can be changed
C. than can become worse
D. that can not be prevented
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In the second half of the 18th century, we already find advocates of this view, such as Joseph Priestley, whose Rudiments of English Grammar (1761) insists that 'the custom of speaking is the original and only just standard of any language'.
A. standards
B. supporters
C. customers
D. researchers
At the age of five, six, well past the time when most other children no longer easily notice the difference between sounds uttered at home and words spoken in public, I had a different experience.
A. used
B. completed
C. heard
D. spoken
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
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