The old man often looked back on the past days ________ he worked hard to make a living.

It is not immediately clear              the financial crisis will soon be over.

Though he got up early, ______ he missed the train.

—Could I use your dictionary?—I’m sorry it isn’t here. I’d get it for you_______ I could remember who last borrowed it.

The boy said sadly，“No one can tell ______ will happen next.”