问题
单项选择题
When Jack arrived, he learned Mary （） for almost an hour.
A.had gone
B.had set off
C.had left
D.had been away
答案
参考答案：D
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When Jack arrived, he learned Mary （） for almost an hour.
A.had gone
B.had set off
C.had left
D.had been away
参考答案：D