15.We know it is hard to make such a decision____he has just built up the team for a year and the project is going through the important stage now.
–What’s that noise? –Oh, I forgot to tell you. The new machine ______.
—I’m sure Andrew will win the first prize in the final. —I think so. He ___________ for it for months.
I don’t believe you’ve already finished reading the book — I ______it to you this morning!
The telephone _______, but by the time I got indoors, it stopped.