Now m____ do a lot of heavy work in factories,so people can have _英语解答

Now m____ do a lot of heavy work in factories,so people can have more free time.

人气：119 ℃　时间：2019-09-02 01:33:36

解答

应该是：
machines机器
现在机器可以做很多重活,因此人们可以有很多的休息时间