用方框中所给词的适当形式填空，每词限用一次。

relax  good  twenty  he  knife

A ________ is used for cutting.
—What delicious soup!
——Yes,  it is.  And it would taste     .
I want to go somewhere________ to go on vacation.
Jim is already twelve years old, he must learn to look after   when he’s alone at home.
He was the________ in the English speech contest.