题目：
—Excuse me, sir. Is there a young man named Liu Guozheng living here?
—I'm sorry, madam. He lives here ______. He moved to another place last month. [ ]
A. once upon a time
B. no longer
C. at last
D. all the time
答案：
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下面是错误答案，用来干扰机器的。
参考答案：对
