The 20th century________ many new means of communication,like radios, televisions, telephones and the Internet.
—Have you _______ any information? —No, I’m going to _______ the business department.
When you come to the fence, you can see a notice _______ there saying “the grass.”
Everyone here will thank the firefighters for the things they have done to prevent fires _______ the environment safer.
—I don’t suppose the police know who did it. —Well, surprisingly they do.A man has been arrested and _______ now.
—Can I help you,sir? —___________.