----It’s a long time since I saw Kevin. What has happened to him?----Well, to tell you the truth, he _______ for nearly a month.
The singer sang the song ______ for her mother.
______ is no wonder that people say that computers are ______ the world.
She spent an ______ one week to finish the paper.
His wife gave a sigh of ______ when she knew he was alive.
The professor is in ______ health and can’t walk any more.