shoes的代词时it还是them?

shoes的代词时it还是them? 水的物主代词是什么　them　还是it telephone number用代词them还是it 2 cents用代词代指是用it还是them用代词代指是用it 还是them 如果代词代表的物品有多种不可数名词用it还是them? 如果代词代表的物品既有可数名词,又有不可数名词,用it还是them fees,如果用代词是用it还是them? 英语中代词在动介词组,动副词组的位置例,work on them 还是work them ontake out/off it 还是take it out/off?代词放在动介词组间不行吗?如：work them on? pair的用法This pair of shoes looks nice.I want to try ___ on.it还是them? litter 的代词是it 还是themThere is a lot of litter ,please pick_____up.A.it B.them this pair of trousers is cheap enough.can i try them/it on?用it还是them?答案用的是it,但是书上shoes用的是them.为什么呢? them的反身代词 invoice 是不可数名词吗?如果是指很多发票时,代词用IT还是THEM,谢谢 This pair of shoes is very nice,please try __on ,Tony.填it 还是them The pair of shoes is nice,I'' take ___.填it还是them their的名词性物主代词是theirs还是them? 英语中裤子的代词用it还是themI bought the jeans yesterday.What do you think of __A.it B.them C.that D.those 在英语中如果两个并列的不可数名词做主语谓语动词是用单数还是用复数,如果用代词代替用them还是用it