---- I will come to attend your lecture at 10:00 tomorrow.---- I’m sorry, by then my lecture will have ended and I _____ in my office.
I find the story really worth ______.
I will never forget the day _____ we spend together.
I will never forget the day _____ we worked together in London.
________ your letter, I would have started off two days ago.
_______ you’ve got a chance, you might as well make full use of it.