It was____to watch small childen play games.

So far we have done a lot to build a low—carbon economy, but it is ____ideal. We have to work still harder.

 -Are you pleased with what he has done?　-Not in the least. It couldn’t be ____.　

Tom sounds very much ____in the job, but I’m not sure whether he can manage it.

______to take this adventure course will certainly learn a lot of useful skills.