单项选择题

A．advance
B．in advance
C．advanced
D．advancing
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单项选择题
A．otherB．importantC．famousD．ingenious
A．other
B．important
C．famous
D．ingenious
单项选择题
A．is foundB．is to be foundC．be foundD．has been found
A．is found
B．is to be found
C．be found
D．has been found
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