单选题：Last Sunday she came to visit us out of the blue. The italic

题目内容：

Last Sunday she came to visit us out of the blue. The italicized phrase means __________ A．unexpectedly
B．unhappily
C．untidily
D．unofficially

参考答案：

答案解析：

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分类：专四题型：单选题

分类：专四题型：单选题