They _______ all the details of the plan time andagain to make sure that the project went smoothly.

________ some students are not aware of is ________ difficult life can be if they are not devoted to study

Are the books________ — No, they belong to________.

He was so diligent that he _____ as a fresher in Qinghua university three years later. [ ]

Are you pleased with the play? ——Not at all. It couldn’t have been___.