i bought this book _ one yuan a copy.填ati bought this book _ fifty cents.填for

分类: 作业答案 • 2021-12-20 02:19:59

问题描述：

i bought this book ___ one yuan a copy.填at
i bought this book ___ fifty cents.填for

答

at 表示以XX的单价购买
for 表示一共出了多少钱

i bought this book ___ one yuan a copy.填ati bought this book ___ fifty cents.填for