If we are all willing to make _____ with each other ______ when we are in dispute，quarrels and conflicts will be avoided and we will surely live in peace.

In a(n) _____ to help preserve history, the Greek government established a committee to undertake the professional restoration of the Acropolis.

As more and more cars are produced and used, so the _____ from their exhaust-pipes contains an even larger volume of poisonous gas.

Life is full of _______.School is thought as the most ­­­_______ obstacle(障碍) in the lives of youth today.

 To have a good performance in the coming speech contest, first of all, you  should know your ______.