It’s no use____ that you didn’t knowthe rules

_____ the earth to be flat, many feared that Columbus would fall off the edge of the earth. [ ]

Have you heard that Tom was given a good beating by his father last night— He ________ it. He was making trouble everywhere all the time.

Reading books is very important for developing the students’ understanding of the world, _______?

Mary told me she would computer studies. —Really? I’ll try my best to ask her to such foolish ideas.