Do you think everything is done by a computer? I don't think so.请问这二句话正确吗？

-------Do you think everything is done by a computer?
-------No,I don't think so
这样能好点
希望是对的

用everything can be done by computers吧

把a computer变成computers.
第二句正确。

写的很好，，被动语态呢。
就是by后面需要复数形势。computers

恩，应该该成do you think everything can be done by a computer?
其实你打的句子没有错,但是从语气上有点不舒服~