The long wait for news of my exam results has already set my nerves______.

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问题 The long wait for news of my exam results has already set my nerves______.

选项 A、on fire
B、on edge
C、on earth
D、on impulse

答案B

解析词组辨析。on fire“着火；起火”；on edge“紧张；急切”；on earth“究竟，到底”；onimpulse“一时冲动，一时心血来潮”。根据句意，能与nerves(神经)搭配的短语只有on edge。故答案为B。

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