Fill in the gaps with although,because,but,or so

1:I love fast food a lot____it is not very healthy

2:I'd like to go with you,___I'm too busy right now

3:___it was very cold,she wasn't wearing a coat

4:I invited her to the party,___she didn't want to come

5:there are no buses this hour,___we need to catch a taxi

6:she bought a new laptop___she needs it for her job