问题
选择题
_____, we decided to spend the night at the foot of the mountain.
A．With the moon appeared
B．The moon appeared
C．The moon being appeared
D．As the moon appeared
答案
答案：D
考察句型结构。根据句子结构可知，该部分作状语，排除B。月亮和出现是主动关系，排除C。With的符合结构doing表主动，done表被动，所以A应当是with the moon appearing, 所以答案选择D，
句意为，当月亮出现的时候，我们决定在山脚下过夜