单项选择题

A．To show that high school students can be very shy.
B．To explain that blushing is a learned behavior.
C．To prove that blushing is not easily controlled.
D．To say that his shyness is more serious than hers.
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单项选择题
The Theory of Relativity________.
A．was put forward by Einstein after he formulated the "E=mc2" equation
B．challenged the previous view of universe
C．announced the beginning a nuclear age
D．was not recognized by the other scientists before Einstein’’s death
单项选择题
Mrs. Brown decided to have the picnic in a certain meadow without much thought.
A．Y
B．N
C．NG
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