I can’t remember when exactly the Robinsons left city. I only remember it was Monday.
As is natural, a man as old as he ____ be very forgetful.
Can’t we just live in today, _______ the worries of tomorrow or the regrets of the past?
I had been puzzled over the problem for over an hour without any result, ____ all at once the solution flashed across my mind.
On the third floor there are two rooms, ____ is used as a meeting-room.
---Does ____ of the two foreigners work in Chengdu? ---Yes.____ of them have been working here as English teachers for three years now.