He asked a lot of questions, none of ______ was easy to answer.
It is no good __________ him to see you off.
—The light in the office is still on. —Oh,I forgot __________.
She pretended __________ me when I passed by.
Sometimes customers can't help __________ the things they don't re-ally need.
I __________ walking in the garden __________ watching TV in the room.