阳光通过三棱镜后会分散成（红）、（橙）、（黄）、（绿）、（蓝）、（靛）、（紫）七种色光。（）
参考答案：对
—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
Most of us found ______ difficult to finish the work in such a short time.
A．this
B．which
C．what
D．it
