8.About 80 percent of the students in our school_____ been working on the program and about two-thirds of the work _____been finished.
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.
— Can I have a day off tomorrow, Mr. Johnson?— ________. I can manage without you.