问题
单项选择题
On hearing a great noise, Mike looked forward through the window （）what happened outside the room．
A.to seeing
B.to see
C.seeing
D.to have seen
答案
参考答案：B
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On hearing a great noise, Mike looked forward through the window （）what happened outside the room．
A.to seeing
B.to see
C.seeing
D.to have seen
参考答案：B