题目内容
（请给出正确答案）
[主观题]
There's a boy outside ______ is running across the road from that house.A．whichB．whoC．that
There's a boy outside ______ is running across the road from that house.
A．which
B．who
C．that
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A．高速
B．低速
C．中速
D．任意
