i spent 100 yuan on this coat(改为同义句)

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• I need to pay three yuan for the book.(改为同义句)
• I spent half an hour writing the letter 改为同义句
• I spent two hours cleaning my room 改为同义句
• She spent 100 yuan on the shirt 改成同义句
• he spent twenty yuan on the shoes(改为同义句)
• I spent two hundred yuan on the T-shirt.( 改为同义句) I ___ two hundred yuan __ the T-shirt.
• the t -shirt cost him more than 100 yuan(改为同义句)
• I spent 49 yuan on this English-Chinese dictionary(改为同义句)
• I spent ten yuan on the book.I ____ten yuan ____the book.改为同义句
• She spent 100 yuan on the shirt 改成同义句
• 代数式x²-8+（1/3）xy-3y²+3kxy中不含xy项,则k=______ 不含xy项该怎么理解?
• 当K=（）时,x²-3kxy-3y²+三分之一xy-8 不含xy项1+2+3+…+99+100+99…+3+2+1 等于多少