Many kinds of work ________ done by computers.A.has B.has been C.have been D.was 答案给的是C work不是不可数名词吗为什么还要用复数啊?

On weekend,they have many kinds of _(party) many kinds of work用is 还是are They can do many kinds of work 中的work怎么不加s,不是有many kinds of 吗? many kinds of “many kinds of clouds”, many kinds of 造句! many kinds of翻译 是many kinds of fruits还是 many kinds of fruit People use computers for doing many kinds of work.改同义句 many different kinds of ________ many+kinds+of++flowers+对吗 many kinds of animals 是什么意思 用 many kinds of造句 Many kinds of work ___of robots 填are done还是is done看的是kinds还是work?是by 打错了~ different kinds of /many kinds of的区别 we can see ()flowers 为什么填all kinds of?many kinds,many kinds of可不可以 填空:(公园有各种各样的动物)There are _ kinds of animals in the zoo.(all/many) Robots can do many kinds of ______.A.a job B.jobs C.works D.a work选哪个？为什么？