Chains make learning flexible.
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Which of the following can be called as a "lame duck" ？
A disabled little child.
B. A hard-working farmer.
C. A politician who has to come to the end of his power.
D. An absent-minded old professor.
The phrase "talking shop"(Line 4, Para. 6)probably means______.
A. talking about shopping
B. discussing one's work with colleagues
C. exchanging personal news
D. talking with friends in a group
By referring to the artificial grammar, the author intends to show______.
A. its significance in the study
B. an inherent pattern being learnt
C. its resemblance to the lights
D. the importance of a night' s sleep
What advice might Maquet give to those who have a crucial test the next day？
A. Memorizing grammar with great efforts.
B. Study textbooks with close attention.
C. Have their brain images recorded.
D. Enjoy their sleep at night soundly.
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