【单项选择题】
We must make a difference between（）language and（）language.
A、A.spoken；written
B、B.speaking；written
C、C.speaking；writing
D、D.speak；write
查看正确答案
A、We must use all kinds of tools carefully and return it after using. B、We must use every tool carefully and return it after using. C、A+B D、We must use everything carefully and keep it after using.
