It was at Christmas ____ we bought some games and toys to take to the Children’s Home.
问题描述：
It was at Christmas ____ we bought some games and toys to take to the Children’s Home.
A. when
B. that
C. which
D. on which
A还是B? 为什麽?
哪一个啊.. = =
答
B
强调句型,这个句型的特点是去掉"It be"和"that",句子本身还是通顺的.