Open, Close, or Hyphenated?

I am thinking of changing my...

• Hair style

• Hairstyle

• Hair-style

Did you buy some...?

• toothpaste

• tooth-paste

• tooth paste

She buys and sells...

• real estate

• realestate

• real-estate

Vietnam was twice ... of the league.

• runner-up

• runner up

• runnerup

How many ... are there in your house?

• bedroom

• bed room

• bed-room

... are taught by my grandparents.

• Table-manners

• Table manners

• Tablemanners

I need to go to the...

• postoffice

• post-office

• post office

You need to have...

• self-respect

• self respect

• selfrespect

It is difficult to maintain a ... relationship.

• long distance

• long-distance

• longdistance

... and ... are absolutely worst for your health.

• Junk food/ soft drinks

• Junk food/softdrinks

• Junk food/ soft-drinks

• Junk-food/soft-drinks

• Junkfood/softdrinks