what duo you call this in English?_It's a stamp .It's used _____sending letters.

分类: 作业答案 • 2021-12-19 22:20:16

问题描述：

__what duo you call this in English?___It's a stamp .It's used _____sending letters.
( 为什么这里要用FOR .不用TO.)
sth be used to doing 也指被用来做=be used for

答

for 表原因
而be used to doing 表过去经常做的事
显然用for比较清楚,也让人明白

__what duo you call this in English?___It's a stamp .It's used _____sending letters.