单项选择题


A．sign
B．signal
C．symbol
D．mark
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单项选择题
The author believes that the only way to abolish war is to ______.
A．abolish nuclear weapons
B．let the stronger side take over the world
C．improve bacteriological and chemical weapons
D．settle international issues through negotiation
单项选择题
A．placesB．nestsC．residencesD．habitats
A．places
B．nests
C．residences
D．habitats
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