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

That effort, however, proved at best to be a limited success.

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

Unfortunately those efforts have proved to fall a little bit too short.

His efforts might prove useless, but he had to try.

That he makes only a glancing effort to prove his case will probably matter little.

As it turned out, the two men's efforts proved to be unnecessary.

It was hard work climbing, but the effort proved its worth.

A modest effort to raise $1,000 proved to just a beginning.

These efforts proved to be in vain for the most part.