—Have you ever seen two leaves that are exactly the same?—Never. Leaves differ ____ each other ____ size and shape.
21. ---It looks heavy. Can I give you a hand? ---_______.
—Sorry, do you mind if I smoke here? —Yes,
-----Ken,, but your TV is going too loud. -----Oh, I’m sorry. I’ll turn it down right now.
It is only by practising English for several hours every day _________ be able to use it freely.
Eric fell ill suddenly but was so foolish. He didn't even have ________ common sense to send for ______ doctor.