问题描述：
"How long do you suppose it is _____ he arrived here?"
“How long do you suppose it is _____ he arrived here?”
“No more than half a week.”
A.when B.before C.after D.since
which one/ why?
“How long do you suppose it is _____ he arrived here?”
“No more than half a week.”
A.when B.before C.after D.since
which one/ why?
问题解答：
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