Either you or he _______ to give them a lecture tomorrow.

--- I hear a number of workers in the factory ______ out of work.--- Yes, and the number _______ quite huge.

The father as well as his three children       skating on the frozen river every Sunday afternoon in winter .

This pair of jeans______ too much. I don’t want to buy_______. 

All the scientific evidence        that increasing use of chemicals in farming    damaging our health.