问题
选择题
—Where's the report?
—I brought it to you ____you were in Mr. Black's office yesterday. [ ]
A. if
B. when
C. because
D. before
答案
答案：B
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—Where's the report?
—I brought it to you ____you were in Mr. Black's office yesterday. [ ]
A. if
B. when
C. because
D. before
答案：B
