单项选择题

______ he returns nothing can be done.

A．Till
B．Until
C．That
D．Whether
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单项选择题
The first paragraph is mainly about ______.
A．the characteristics of shy people
B．the cause of shyness
C．the questions in the minds of shy people
D．the effect of shyness on people
单项选择题
The best title of this passage can be ______ .
A．Surroundings
B．Intelligence
C．Dependence on Environment
D．Effect of Education
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