单选题：How do you account for your absence from the class last Thur

题目内容：

How do you account for your absence from the class last Thursday? A．explain
B．examine
C．choose
D．expand

参考答案：

答案解析：

请在第 _(63)___ 处填上正确答案。

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A petition has to be mailed to the Prime Minister's house in London .A．Right B

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