I have 20 dollars in cash.请问这个句子为什么要用 in 呀?

I have 20 dollars in cash.请问这个句子为什么要用 in 呀? i have got two dollars in quarters .in quarters 最好能再说明一下 I have turned ten dollars into million dollars. if i have a million dollars作文 I have 什么 20 dollars pieces.1 spending 2 spent 3 spends 4 spend on _not_,I still have 20 dollars.not前后的空该填啥呢 the shoes are 14 dollars,but I have only six dollars.I can't b________ it. 英语翻译We have ()()()for only 20 dollars 英语作文《If I have a million dollars》 if i have a million dollars 会做些什么 if i have a million dollars 英语作文 I have 1.87 （ ） A.dollar B.dollars 英语翻译If you have read and paarece me very well.I have only one more pregunata.now I have the dollars I wonder if I could cancel that in my currency and if you have any increase in the cost for not being dollars.As would be the cost? 英语翻译About how much will I have to pay?I do not know in the case of China.I insist that your parentsdo not pay a cent; I have Australian dollars,they have RMB. We have bags in all kinds at 20 dollars.这句中为什么用at?我们最近新学好像是for？ I have three ___notes in my pocket.A five dollar's Bfive dollars两者的区别,该选哪个，为什么选那个先项？并说明理由 英语翻译翻译下面对话并说明complex在居中是什么意思W:Excuse me ,Do you have any apartments available for under 500 dollars a month?I need to move in next week when my new job starts.M:The only vacant one I have is 600 dollars.Have 1.He is not taller than me.He is no taller than me.这两句有什么区别?还有2.She is not good in speaking English.She is no good in speaking English.3.I have no more than ten dollars.I have not more than ten dollars.这三句中的用not 和用