问题描述：
高中英语（单句改错）4
One thousand years in the future,people on the earth may be able to dispose their rubbish using ecological system.
怎么改呢?
有人这么改：One thousand years in the future,people on the earth may be able to dispose their rubbish [of] using ecological system.
括号里是加的,为什么这么改呢?
using不就是“用”的意思么？不加这个of不对吗？
One thousand years in the future,people on the earth may be able to dispose their rubbish using ecological system.
怎么改呢?
有人这么改：One thousand years in the future,people on the earth may be able to dispose their rubbish [of] using ecological system.
括号里是加的,为什么这么改呢?
using不就是“用”的意思么？不加这个of不对吗？
问题解答：
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