When products made in factories _____, they are thrown away as garbage.
| A．come to an end | B．are put to use |
| C．are used up | D．wear out |
The singer sang the song ______ for her mother.
| A．specially | B．special | C．specialized | D．specialty |
______ is no wonder that people say that computers are ______ the world.
| A．There, taking over | B．There, taking down |
| C．It, taking down | D．It, taking over |
She spent an ______ one week to finish the paper.
| A．addition | B．add | C．additionally | D．additional |
His wife gave a sigh of ______ when she knew he was alive.
| A．relieve | B．relief | C．release | D．relieved |
The professor is in ______ health and can’t walk any more.
| A．failure | B．failed | C．failing | D．fail |