题目：
By the end of last week, she______in the west of China for two months helping the homeless children.
A．will stay
B．has stayed
C．would stay
D．had stayed
答案：
答案：D
题目分析：根据时间状语By the end of last week到上周末为止，可知本句描述的是过去某时之前已经完成的动作，故用过去完成时态，选D。
By the end of last week, she______in the west of China for two months helping the homeless children.
A．will stay
B．has stayed
C．would stay
D．had stayed
答案：D
题目分析：根据时间状语By the end of last week到上周末为止，可知本句描述的是过去某时之前已经完成的动作，故用过去完成时态，选D。
