单项选择题


A．too
B．but
C．or
D．and
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单项选择题
A．surviveB．survivingC．survivesD．survived
A．survive
B．surviving
C．survives
D．survived
单项选择题
A．continueB．continuityC．continuousD．continued
A．continue
B．continuity
C．continuous
D．continued
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