It is said that bad living habits as well as dirty surroundings, stuffy rooms and some other factors _____ the wide spread of H1N1.
A football suddenly flew over our head and it ______ missed hitting a child playing nearby.
I believe that the 21st century is one ______ China will become one of the most powerful economic countries.
–The new museum of art is an unusual ______. --But it is designed by a very young architect.
It’s natural that a man can hardly ______ a smile when he hears some good news.
We Chinese eat with chopsticks ______ most westerners eat with knives and forks.