Make a tentative guess _____ Peking Man _____ have done and used thousands of years ago.
. It’s a mistake to think of Chongqing only ______ its tourist attractions.
. I _____ to telephone you last night, but the line was out of order and I couldn’t get through.
. I would like a new job which pays more, but ______ I enjoy the work I’m doing at the moment.
. Service was included in the bill, so you _______ the waiter. It was a waste of money.
. When you copy this paper, be careful not to ______ a single word.