一对耳环是a set of earrings 还是a pair of earrings

一对耳环是a set of earrings 还是a pair of earrings a set of a set of They are a set of keys ,It's a set of keys 哪个是正确的? 是a set of keys还是a set of key?哪个正确? a complex set of 具体 complex set Frank,look at that ____是填 a set of keys还是填set of keys set和a set of的区别set是一套的意思,a set of 也是一套的意思,他们为什么不能互换,用法有不同吗 汉译英 这对金耳环可能是给我妈妈的礼物.This pair of gold _ _ _ a present for my mother. A set of keys是单数还是复数? a set of后面的名词是单数还是复数? a set of是什么意思啊? set a record of造句 a set of译成英语 a set of ____(key). 是there is a set of keys还是there are a set of keys?is or are 英语短语开头要不要大写,要不要标点 如 是 a set of keys 还是 A set of keys. She _________ a sum of money for her old age.A.set up B.set aside C.set in D.set offShe _________ a sum of money for her old age.A.set up B.set aside C.set in D.set off请问哪个是对的?