By tradition, in Britain, 21 guns are fired as a general rule () the Queen on her birthday. ( 章节:4 难度:2)
- A、in memory of
- B、in salute to
- C、on behalf of
- D、in celebration of
正确答案:B
答案解析:有

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By tradition, in Britain, 21 guns are fired as a general rule () the Queen on her birthday. ( 章节:4 难度:2)

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