Circle the mistake in each sentence. Then correct it.

1. (A) The Internet has become (B) so a convenient tool (C) that people can't live (D) without it.

2. My sister has never been (A) to Mexico, but she writes a blog (B) about it (C) on the Internet as (D) like she had spent a lot of time there.

3. There are (A) so many (B) adverts (C) in the local press (D) so I get really annoyed

4. Today it (A) does not take much time for news to reach (B) people around the world (C) as if it (D) used to take in the past.