my sister is used to—with all the windows opena.sleep b.sleeping c.have slept d.the sleep 应该选哪个?

问题描述:

my sister is used to—with all the windows open
a.sleep b.sleeping c.have slept d.the sleep 应该选哪个?

选a used to do something固定句型

选B.used to doing的意思是习惯做某事.符合题意.希望能够帮到你,