题目内容
【题目】Those foreign friends left for Shanghai ______.
A.since last week
B.a week ago
C.for a week
D.since a week ago
【答案】B
【解析】
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题目内容
【题目】Those foreign friends left for Shanghai ______.
A.since last week
B.a week ago
C.for a week
D.since a week ago
【答案】B
【解析】
