Choose the correct linking word/phrase

1. [Although|On the other hand,]
   package holidays are cheap, the accommodation offered is not always comfortable.
2. [In contrast,|To start with,]
   sport is good for people's health and helps them keep in shape.
3. [What is more,|Even though]
   children who spend too much time playing computer games have poor social skills.
4. Millions of dollars are spent looking for extraterrestrial life.
   [However,|Such as,]
   it is uncertain that other intelligent life forms exist in the universe.
5. One point of view
   [against|in favour of]
   studying online is that you can study whenever you want to and you can find a wide variety of information on the Internet.