Dr. Bhattacharya and Dr. Sheth's answer to the question in the first paragraph may be that
A. it is still not clear to scientists.
B. it comes from subconsciousness.
C. it comes from consciousness.
D. it is a question of no answer.
【C18】
A. asking
B. requesting
C. calling
D. demanding
【C16】
A. advanced
B. grew
C. reduces
D. multiplied
Craftsmen might prefer to trade in their own town because
A. there they could easily find good refreshment.
B. there they could work in the open air.
C. there they could start work very early.
D. there they could have the well-placed stalls.
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