问题描述：
1、David hasn't come yet.I think he will ———soon.
A、turn on B、turn off C、turn down D、turn up
改错：
2、Over time computers have changed quite a lot.
3、I could “think”logical and produce an answer quicker than any person.
A、turn on B、turn off C、turn down D、turn up
改错：
2、Over time computers have changed quite a lot.
3、I could “think”logical and produce an answer quicker than any person.
问题解答：
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