But serious problems remain.

There are four deep problems.

But serious challenges lie ahead.

Greece undoubtedly has serious problems today.

Cloning people raises serious ethical problems.

There are also serious diplomatic and political problems.

But there are serious problems with Putin s strategy.

Russia faces serious and intensifying financial problems.

The sub prime crisis has exposed serious problems that we must address.

The unpredictable evolution of warfare poses a serious challenge for defense planners.

We are always exposed to some kind of danger.

China can already see considerable problems in the medium term.

Serious problems appeared to be skirted, deliberately hidden, or played down.

They could be lending to an institution that is in serious financial trouble.

We don't want any bad publicity.

Do you have any sales experience?

), eliminating concepts that are specific to a particular culture or time.

Neither Democrats nor Republicans have an interest in choking off economic activity. This is not a partisan issue.

It is easy to host a party.

This is not a partisan issue.

Are there any souvenir shops here?

Tom managed to finish the work without any help.

This is the best gift I've ever received.

A policy is adopted to fix one problem, only to create another problem, sometimes one much worse than the original.

Moreover, the current economic downturn is creating especially severe problems for the Salvadoran economy.

To be sure, the big issues that the Federal President listed when he dissolved the Bundestag are real.

I sometimes have trouble remembering things.

There is no easy solution for the eurozone economy, for Greece, for Ukraine, or for any of the other major challenges we face today.

Freedom belongs to no particular nation or system.

I don t think they have any meaning.

Government regulation was incapable of dealing with the issues involved, although it was certainly helpful to devise ways of making destructive hackers criminally responsible.

Nor would innovation by one company help.

It is in no way administratively or financially accountable to the Moscow Patriarchate.

This is the longest novel that I have ever read.

I'm looking for information about Boston.

I'm not sure we have any choice.

This is the most beautiful sunset I've ever seen.

I don't think Tom has any experience.

I don't think that Tom has any experience.

An engine, or motor, is a machine designed to convert one form of energy into mechanical energy.

We should be open to other ways to stop warming such as cutting carbon emissions in the future instead of now, or focusing on reducing emissions of other greenhouse gases.

(Indeed, a few of these countries have recently been wrestling with severe problems.)

The inherently erratic behavior of the major renewable energy technologies presents serious problems for power system planners.

But lately, more complex problems are beginning to arise from humanity s sharing the atmosphere. Carbon and fluorocarbons affect everyone s children.

The world's drug problems are far more severe today than they were a century ago. Not that drug use has increased fantastically after all, huge quantities of alcohol, opium and other drugs were consumed back then.