Then or Than?

He is taller (a)   her.

I am going to have lunch and (a)   go for a walk.

Kate is older (a)   her sister.

Set your alarm clock, (a)   go to sleep.

He went to the game and (a)   we had dinner together.

I like strawberries more (a)   apples.

In the Summer the days are longer (a)   in the Winter.

I find Messi a better player (a)   Ronaldo.

Clean your room and (a)   take the dog for a walk.

I will study now for one hour and (a)   I will rest.