1.   A team of scientists has been studying the effects of acid rain over a twenty-year period.

2.   A team of scientists has been studying the effects of global warming on Antarctica.

3.   An interesting study, this, of the varying techniques with which different men approached the moment of truth.

4.   Andrew is studying law at Harvard University.

5.   Anna is studying French literature.

6.   Archaeologists are studying DNA samples from ancient Egyptian mummies.

7.   As an M.B.A. student, you study all aspects of business.