Which word of the following has the same meaning as “fall”?

—Where can I buy some books, Simon?—Go to the _______ in the shopping mall in Old Street. You will find many books there.

—I’m sorry I went out for a smoke. I was very tired.—There’s no ______ for this while you are at work.

—What would you like to say to your ________ before leaving school?—I’d like to say “Thank you very much! I’ve learnt a lot from you in the past three years.”