Nearly all educators believe that a challengingsituation can often _______ the best qualities of a person.

When I have some worries, my close friends always adviseme ______too much.

A cat, ______ it is a white one ______ a black one, is considered to be a good cat as long as it can catch mice.

Though most people know that smoking ________ the risk of cancer,it is still hard for them to give it up.[ ]

Is this factory _____ your sister used towork