On rainy days, accidents ______ happen sometimes on steep roads.
Every girl and every boy _____ the right to join the club.
We will do everything we can _____ out city and people.
Mr.Smith told us that gold medal his son had got was considered honor to the whole family.
The thought of going back home was _______kept him happy while he was working abroad.
It is reported that the US uses ________energy as the whole of Europe.