They all looked ____ at the master and felt quite _____．

When the expression first came into being, people refused （拒绝）to use it but _____ they began to accept it. 

I wasn’t blaming anyone; I           said errors like this could be avoided.

Everything was placed _______ where he wanted it for the party, with which he was very satisfied.

Scientists will have to come_______ new methods of increasing the world’s food supply.