Because of the worldwide breakout of H1N1, many countries have placed on travel to prevent the further spread of it.
The traffic on the main streets has a longer green signal than _______ on the small ones.
I’ve lived in New York and Chicago, but don’t like ____ of them very much.
There are a small number of people involved, possibly ______twenty.
(2013·浙江,11)Half of ________ surveyed in 16 countries say they go first to their closest friend to share their deepest wishes and darkest fears.
Recycling is one way to protect the environment; reusing is ________.