Theearthistheplanet
问题详情：
The earth is the planet _______ provides us with everything we need，fresh air，clean water and so on．It's our duty to protect it．
A．who B．that C．where
【回答】
B
知识点：定语从句
题型：选择题
问题详情：
The earth is the planet _______ provides us with everything we need，fresh air，clean water and so on．It's our duty to protect it．
A．who B．that C．where
【回答】
B
知识点：定语从句
题型：选择题
