the machines are (sent的一种形式）to the countryside at once回答五花八门？哪个正确呢A、to sendB、to be sentC、sendingD、be sent

The clothes are made by machines.还是The clothes are made by machine.那个句子对? The clothes are made by machines.还是The clothes are made by machine. The stones are so heavy.How_they_to the top of the building without modern machines? the machines made in china are cheaper than made in japana.oneb.thosec.thatd.it A lot of introductions on how to operate the machines are written in English 英语小题Now machines are widely used all over the world.Why are machines so important andNow machines are widely used all over the world.Why are machines so important and necessary（必要的）for us,because they can help us to do things better 翻译：X_ray machines are now used all over the world to help doctors see the problem easily. Most of the farm work __________ by machines in the USA.A.is done B.are doneC.is doing 英语翻译With double sheets the following machines are working by the period which was adjusted here additionally. Many useful machines were __1__ by inventors.These machines have __2__Many useful machines were __1__ by inventors.These machines have __2__the world a lot.There are many great inventors in the world,and Watt was one of them.Watt was English.When he Computers are very powerful calculating machines（改为感叹句）______ ________calculating machines computers are Don't touch the machines,please! 英译中:Machines below the following specifications Engines are to machines what hearts are to animals 翻译 people who are c___ reporters find out the newsnews keeps corning in f____ all corners of the world.the headline of a news story is very i____.then they are s____ to the place where big machines are at work.all night long ,the machines are busy w____ Machines are going to do Machines are going to do most of the worldMachines are going to do most of the world ,and so pelople are going to have more holidays .They are going to fly to the moon by spaceship and have their holidays there . There are two ways to make these machines,but_ it worthy of note.A.a first B.one C.the one D.the first Many a customer ________ about the poor quality of the washing machines.A、complainsB、complainC、are complainingD、have complained选什么 ,为什么?