请教These are choies 如何翻译中文?

请教These are choies 如何翻译中文? these are 后面要加some吗?如these are some books还是these are books Are these these are a watches和these are a watch有什么区别吗?如题 Memory is on chips these chips are connected to the system board请教计算机英语朋友, who are these?这样写对吗?如题 Are these pigs 作否定回答如题 Are these your trousers?Yes,these are, these are his shoes.( )are these ()? 请教这句话的翻译：these days are best used for revision and refinement than brand new endeavors. they are和they're的区别?如题are these your grandparents?_____.a.yes,these are.b.yes,they're.c.yes,they are.d.these are. Are these your Are these your pencils? These bags are heavy. Are these pens ___? Are these shoes? These are my friend how much are these