Are the set of the keys ..? 还是Is the set of keys .?

Set X has x Members and Set Y has y Members.Set Z consists of all members that are in either Set X or Set Y with the exception of the k common members(k larger than 0).which of the following represents the members of members in Set 为什么答案是 Are the set of the keys ..? 还是Is the set of keys .? set of the in the set of The set of keys 后用is 或are? There are a set of k___ in the case A set of keys ---(be) on the table.There ---(be) a set of keys on the table.---(Are they/Is it) your set of keys? the set of 的意思 定语从句 The old man has a set of teeth__ are taken good care of a set of keys is on the sofa.(on the sofa部分提问）__a set of keys?my keys are on the desk.(on thedesk部分提问) you are the one who set it up这里set Set P consists of all the positive even integers less than 14,and set Q consists of all the positive multiples of 3 less than 21.Set R consists of all members that are either in set P or set Q.How many members of set R are even?(A) 6(B) 7(C) 9(D) 10( There are all () of balls in the storeThere are all k() of balls in the store. A set of keys------[is/are] on the table.let me get------[it/them] A set of keys < > on the desk..请问 空里填 are 还是is ?谢谢! A set of keys------[is/are] on the table.let me get------[it/them] A set of keys are on the table.(改为同义句） （Is） the set of keys yours?为什么用Is 不用Are?