请先看一道题：
He is a hard-working student, _____ who will be successful in whatever career he chooses.
A. that B. he
C. one D. which
【分析】几个干扰项均有可能误选。此题答案选C，one 相当于 a student。类似地，以下各题也选one，它们分别相当于 a table, a break, a question, a Mexican carpet, a moment：
(1) A table made of steel costs more than _______ made of wood.
A. one B. it
C. those D. which
(2)“Why don't we take a little break?” “Didn't we just have _____?”
A. it B. that
C. one D. this
(3) The question is _____ of great importance.
A. that B. it
C. one D. what
(4) She wants a Mexican carpet, but she can't afford to buy ______.
A. one B. it
C. them D. the one
(5) Meeting my uncle after all these years was an unforgettable moment, _____ I will always treasure.
A. that B. one
C. it D. what
