Scientists have known exactly the reason why wearing red might give athletes an advantage．
A. Right
B. Wrong
C. Not mentioned
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Not all earthquakes are strong enough________
In Paragraph 4, the last sentence "King's home was 'an arsenal'" means
A. King's home was a place where people got together.
B. King's home was a place where people tested bombs.
C. King's home was a place where weapons were stored.
D. King's home was a place where bombs exploded.
The first paragraph mentions three ways of activating the saliva in the mouth．
A. True
B. False
C. Not mentioned
请选择（3）处的最佳答案．
A. on
B. in
C. at
D. about
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