I find ________ difficult to remember everything,though I’m still young.

Tom, who is always shy in public, has made some friends at school, ______ has pleased his parents.

We could invite John and Barbara to the Friday night party. —Yes, ______ ? I’ll give them a call right now.

Tom is a little careless, but he is _____ quite suitable for the post. So we can give him a chance.

Throughout the world__________inventions.