单选题 20.  At his word she stood up and walked away, stopping at the window to pull back the curtain and ______.
【正确答案】 B
【答案解析】 句意：听了他的话，她站起身，走开了，然后停在窗前，拉开窗帘，向外眺望。词义辨析题。look into：调查，观察；look out：向外看；look up：抬头望，查阅；look on：旁观。根据句意可知，选B。