用方框中所给的单词的适当形式填空，每个单词限用一次。

Busy      swim      hardly      three      ourselves

Father’s day is on the __________Sunday in June.
The traffic during the rush hour is much __________than usual
We must learn to look after __________ when we are alone at home.
_________is good or our health.
When I got to the top of the high mountain，I could__________ walk any more.