If our government _________ attention to food safety now, our health _______ in danger.

The research on the new bird flu virus vaccine is challenging and demanding. Who do you think can do the job?—____ my students have a try?

News came from the office __________ Wang Lin had been admitted to Beijing University.

has promised to keep the secret, so he won’t tell anyone even though

Jane______a lot of French by playing with the native boys and girls?