It ____ that making a plan is easier than carrying it out

Mr Jenkins has been busy withhis work these days and seldom _________ to come over to have a chat with me

I am sorry to have kept you ___________.—It doesn’t matter. I’ve just come.

(2012·合肥高二检测) Every pupil has his own potential so it is not proper to _______ them _______ two kinds.

As he was too young, he was not ___ the concert hall.