用方框中所给单词的适当形式填空，每词仅用一次，每空一词。

decide    different       little    through     healthy

They            to go on vacation yesterday evening.
There are a few __________ between the two pictures. Can you tell them?
My father plays chess at __________ once a week.
The best way to relax is ____________ exercise.
You should look after your              .