these(this)后面接着is还是are?

these(this)后面接着is还是are? These advice 后面接is还是are? this is a cat变复数是these is.还是they is. This is a pencil and a pen还是These are a pencil and a pen 是this kind of people还是this kind of person,用不用把this改成these 后面是用is还是are啊? Phenomena是phenomenon的复数形式,前面跟this 还是 these?后面跟is还是are?期待权威人士解答This unusual phenomena is worth paying attention to. These are an apple and a pear.还是This is an apple and a pear. ___my mouth and my nose?A.This is B.These are答案是A还是B? something后面接着的是are 还是is This is a box.(改为复数句）是These are boxes.还是These are many boxes. I lost a set of keys.然后是用 Is this yours?还是Are these yours? 应该说are these your shoes 还是is this your shoes? this is my feet 还是these are my feet在百度翻译里查这是我的脚,结果发现写的是This is my feet,但是This后面不是只能用单数,这里却用复数,怎么回事? All of these 后面加 are 还是 is?比如说All of these are about love.RT this is a pair of shoes 后面的谓语用单数还是复数? this is a factory.these machines make crisps怎么读? This is a room用these 改写句子 book?what is thisWhat are these?Is this a book?What are these?This is an eye ...what are these is this a book?what are these this is an eye...