Earth Day is a reminder__we need to care about the world we live inand__we should learn to respect life and nature.A.that；that B which；which C that；what D which；what为什么选A
问题描述：
Earth Day is a reminder__we need to care about the world we live in
and__we should learn to respect life and nature.
A.that；that B which；which C that；what D which；what
为什么选A
答
而且句子成分前后都充分了啊..
不能再加什么了
答
同位语从句必须用that
reminder以后的内容,都是reminder的解释,是reminder的同位语,所以用that引导