问题
选择题
Mary felt sad over the loss of photos she had shot in Australia, ______ that was a memory she especially treasured.
A．as
B．which
C．when
D．where
答案
答案：A
A。这题考查as引导原因状语从句。句意为：玛丽对她丢失了在澳洲拍的照片感到很悲伤，因为那是她最珍贵的记忆。