It is only 　　　　 people know the importance of science 　　　　 science can really serve the people.

My uncle is a famous writer. He _______ many books since he was young.

I have ______ things to do today.

Was it in Shanghai, where the World Expo 2010 was held ______ you met Helen?—Yes. We hadn’t seen each other for about 5 years.

It should bethat the civil servant should be dismissed for the drunk driving