— I rang you at about nine, but there was no reply.— Oh, that was probably _____I was seeing the doctor.
Some students even have no idea of they are studying, so they waste much time playing.
If you ________ smoke in the room, please keep the windows open.
From the top of the tower, people can see at least ________ distance of 10 kilometers on ________ clear day.
A number of high buildings have arisen ______ there was nothing a year ago but ruins.
I’d like to go to Tommy’s birthday party this evening, but I _____ just _____ from the flu.