I soon found that the work I was doing had al-ready been done by someone else. __________,I was wasting my time.
The three of us ________ around Europe for about a month last summer.
He got up late and hurried to his office, ________ the breakfast untouched.
We _________ the difficulty together, but why didn’t you tell me?
________ at the door before you enter my room, please.
________ with care, one tin will last for six weeks.