题目内容：
________all of US who are here tonight，1 would like to thank Mr．Smith for his speech．
A．On account of B．On behalf of
C．For the purpose of
D．Instead of
参考答案：
答案解析：
单选题：________all of US who are here tonight，1 would like to thank
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B．On behalf of
C．For the purpose of
D．Instead of