Question

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

Answer 1

D

试题分析：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。