By all _______, you must try every _______ to help him.

When travelling, you should take traveller’s check, which provide a secure______to carrying your money in cash.

After the earthquake, the government turned a school into a      for the victims of the earthquake.

Though Mark wasn’t well educated，his common       guided him t11rough a life．

A study shows that walking fast in your old age is a ______ that you will live a long life.