问题
选择题
—Where’s that report, Daniel?
—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
题目分析：if是否，如果；when当……时；because因为；before在……之前。句意：丹尼尔，那个报告在哪儿？——昨天当你在布莱克的办公室时，我拿给你了。结合语境可知选B。