Mary dropped in ____ Mr Smith, but he wasn' t at home, so she went to drop in ____ Mr Smith's office.
–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.