It was at the end of the meeting _____ Mr. Smith made the decision.

The price system is a complex network composed of the prices of all the products bought and sold in the economy as well as       of a great number of services. 

My brother would like to buy a good watch but      was available from that shop.

 To her joy, Della earned first the trust of her students and then ____ of her colleagues. 

 One side of the board should be painted yellow, and _______ white.