单项选择题

A．at
B．in
C．on
D．to
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单项选择题
A．hundred ofB．a hundred ofC．hundreds ofD．hundreds
A．hundred of
B．a hundred of
C．hundreds of
D．hundreds
单项选择题
How did Helen reach others’ understanding
A． She taught herself.
B． With the help of her family.
C． With the help of her teacher.
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