138.Some plants can take in carbon dioxide(二氧化碳) we breathe out and give ______ oxygen to us.
题目
138.Some plants can take in carbon dioxide(二氧化碳) we breathe out and give ______ oxygen to us.
A.in case B.in turn C.in return D.in addition
in turn 反过来
为何不能选B
答案
举一反三
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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