1. His brother would like to be ___UNICEF worker, for__organization has been his dream workplace.

A. a, the  B. an , the  C. the, the   D. /, an

2. I think ____necessary to do some running in the morning.

   A it  B that  C this  D one

3. We should prevent air pollution __a happier life.  

A from living  B for living  C to live    D living