I spend two yuan on this books.(用cost转换同义句)

I spend two yuan on this books.(用cost转换同义句) 回答英语问题!讲清楚,现在要!I ___ two yuan on the book. I ___ two yuan for the book. The book _____ me two yuan..(spend, cost, pay) This book_____two yuan .so I two yuan in buying it. A.cost:spend B.costs:spent I spend ten yuan on the picture的同义句 I spend 50 yuan on this chair.改为同义句. I spend 100 yuan on the coat .同义句转换i__100 yuan __the coat 划线提问I spend 15 yuan on this book.划线部分15 yuan I spend ten yuan on this book请问这里的on怎么解释? I spend 10yuan on magazine every week 同义句Magazine—— ——10 yuan every week I spend ten yuan on this book 和 I spend ten yuan for this book 后者是对的吗?为什么? I spend two hours in playing computer games=I spend two hours on computer games吗? 下面几句语法对吗?spend1:I Spend two hours on housework2:I Spend two hours on doing housework3:I Spend two hours in housework4:I Spend two hours in doing housework5:I Spend two hours for housework6:I Spend two hours for doing housework 变同义句1.Tom spend two hours finish hin homework.2.I paid five yuan for the bike. I will spend 50 Yuan on a watch(同义句) =I will （ ）50 Yuan （） a watch =I will 50 yuan （）（）=It（） take me 50 Yuan （）（）a wacth 改同义句,两题.1.I spend five yuan on this pen 2.I can't find my pen 英语判断正误和完成句子请大家帮我判断一下这几个句子的正误,如果哪个错了,请帮我改正一下,1.I spend an hours doing my homework 2.I spend 30 yuan on pen 3.It takes me two hours to do my home work 4.It took him 4 yua I spent two hundred yuan on the T-shirt.( 改为同义句) I ___ two hundred yuan __ the T-shirt. The book cost me 20 yuan (改为同义句)I ____20yuan_____the book.为什么是spend on而不是pay for?