A. Over the years, social psychologists have done a great deal of research on people's attitudes.

And with my strength there came, beginning in April 1986, a great deal of research.

The company went through a great deal of research and engineering to develop the remote.

However, the program has produced a great deal of research.

He had already done a great deal of research.

We must do a great deal of mathematical and physical research.

Yes, a good deal of research is just like that.

I've done a great deal of research, and I can't really say that he couldn't come back.

He has also done a good deal of research since then.

There is a great deal of research into inequalities in health care.