—Would you like tea or coffee?—_________ is OK．I really don't mind．

I would like to buy some good English reference books, but _______ was available from the bookstore, where I only found some Chinese ones.

 —Look at your hands, John. ______ of them is clean.—OK, I’ll wash them at once.

I was blessed with a happy childhood, ______ that most people would want to have.

 – Can you come on Monday or Tuesday? -- I’m afraid         day is possible.