The Americans who acquire their political education immediately they get the fight to vote at the age of 21 are ____ in the world.
(serve) __ the people well is our duty.
You should judge by yourself,______.(别总是跟在你哥哥的后面).
Shefeltinsulted,andobviously________(任何劝他留下来的企图都是徒劳无用的).
We tend to realize the value of __ (我们所拥有的东西) until there is no more of it in our life.
forced to introduce still further innovations for the reasons given above.