But there are grave problems with all of these concepts.

And at a time when we have a grave problem of our own.

But even losing income for a few months can cause grave financial problems.

He went on to say that this presented a grave problem.

Paul has grave problems finding a satisfying relationship with any woman other than his mother.

Unfortunately, too many people do not understand the grave financial problem.

But when they're combined, they set the stage for grave problems.

Many of them have grave academic problems in their own language.

Let us take, for example, some grave problems relating to health care.

I know he worked long and hard to try to find a solution to many of these grave problems.