问题
选择题
—_____ have you been there, Mary?
—S
ince last winter holiday. [ ]
A. How long
B. How soon
C. When
D. How far
答案
答案：A
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—_____ have you been there, Mary?
—Since last winter holiday. [ ]
A. How long
B. How soon
C. When
D. How far
答案：A