You look so tired. You _____have stayed up late again. [ ]

This book is very ________. I don’t like reading it.

what do you think of the matter? —Don’t you remember I have already ________ that it was troublesome?

How far is your family fromhere— It’sabout ten _____ walk.

Today, we’ll discuss a number of cases _____beginners of English fail to use the language properly [ ]