In the plane crash accident, the chance of the pilots’ survival is ______. 

Smoking is one of the ________causes of cancer，killing millions of people each year. 

In that school, English is compulsory for all students, but French and Russian are       .

—Minister, are you satified with the performance of the Chinese athletes in Beijing Olympics? ---Yes, it couldn't have been _____.

If we are not _______ the progress we have made, we will have greater success.