China is embarrassed by such a fact: Chinese visitors______ rubbish on the Great Wall, followed by a foreigner picking up the litter.

--- I’m sure Andrew will win the first prize in the final. --- I think so. He ____ for months.

Do you still remember ber?________her as much as I do now for a long time. 

— Have you ever visited the Opera House?—Yes．When I was in Sydney, I ______ it twice．

The church tower which_________will be open to tourists soon. The work is almost finished.