1. There are three [women] assistants in the [shoe] shop.
括号里面的那2个词，为什么是用women 而不是woman ？shoes shop 这个不对么？为什么？
2.My son wants a pet dog for his coming birthday ,but I have no time to buy [one] for him.
括号里的one 能用it么？为什么？我老是分不清楚，什么情况下才用one 或it。
3.There are 15 foreign student in our class,but __ of them come from America.
A neither B both C either D none
能解释一下这4个词的用法么？
4.I will call you as soon as I ___to Guilin.
A will get B get C got D am getting
as soon as 前后的时态是怎么样的？是不是要一致啊？还是...？
5.When and where to have a meeting___yet.
A is not decided B are not decided C has not decided D have not decided
能帮忙解释一下答案，和理由么？
我想顺便加一个英语好的人，我不懂得时候可以方便询问，可以的话，留下QQ。