A．habitB．expedienceC．harvestD．intake
A. habit
B. expedience
C. harvest
D. intake
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Paragraph 6__________
A. Importance of staying intellectually active
B. Effects of aging on a person’s recall ability
C. Short-term memory versus long-term memory
D. Retention as the sec。nd n8cessity for memory
E. Link between learning strategies and effective mem0ry Skills
F. Significance of exercising your muscles
What didn’t Mr．Cousins do in his experiments With laughter
A. Watch funny TV shows．
B. Read funny books．
C. Sleep whenever he felt tired．
D. Take medicine．
It is the lack of money that has held up the progress in using replacement genes
A. Right
B. Wrong
C. Not mentioned
A．drugsB．curesC．placebosD．medicines
A. drugs
B. cures
C. placebos
D. medicines
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