By the end of the 1980s this decision had proven successful.

Both may prove successful if you have not already tried them.

Still, the company says its data system will eventually prove successful.

But whether the effort will prove successful was not clear tonight.

The program proved successful, officials say, and will be continued this year.

The law changes, in general, are proving successful and popular.

He was sure that they would prove just as successful at sea.

But, she added, the efforts have proved successful in the long run.

The first year proved successful enough for a second season to begin production.

It did not prove successful and only two were built.