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词形填空27by3is9.27by3,andyouhave9.27by3is9.(divide)ManyinancientChinaalotofimportant(invent)Chinaisacountry,whiletheUSAisaone(develop)Abacusisa

题目详情
词形填空
27__________by 3 is 9.
___________27 by 3 ,and you have 9.
________27 by 3 is 9.(divide)
Many________in ancient China __________a lot of important_____(invent)
China is a ________country,while the USA is a _________one (develop)
Abacus is a ____________machine to do ______,that is ,abacus is a kind of _____________(calculate)
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divided
Dividing
Divide
inventors
invented
inventions
developing
developed
calculating
calculations
calculator