______ more and more people may refer to the Internet for up-to-minute news, the newspaper will not disappear.

____________for children, the album became popular with parents __________it came out.

 Inside the White House, there is a room called the Oval Office. That's ________ President Obama works.

Don’t start reading a book ________ you find that it’s one you can read with ease and understanding.

______environmental damage is done，it takes many years for the ecosystem to recover.