问题
选择题
Their cheerful voices showed that they were having a discussion.
A．noisy
B．friendly
C．serious
D．nervous
答案
答案：B
题目分析：考察形容词词义辨析。A吵闹的；B友好的；C严重的；D紧张的；句意：他们快乐的声音说明他们正在进行一次友好的讨论。根据句意说明B正确。
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