Alice, please tell Eric to call me when he _____ back. –No problem.

Last year I was often ill, but now I am good health.

Grandpa is growing old. He keeps on the same thing over and over again.

I would be happier if you did more studying while you are free, but you ___________.

Shanghai Expo has been building an Expo Village for the participants, but other choices will also be ____ if the Expo Village does not satisfy their needs．