這個 one 是什么意思

　　這道題該選one嗎，它是什么意思?

　　He is a hard-working student, _____ who will be successful in whatever career he chooses.

　　A. that B. he

　　C. one D. which

　　【陷阱】 幾個干擾項(xiàng)均有可能誤選。

　　【分析】 此題答案選C，one 相當(dāng)于 a student。類似地，以下各題也選one，它們分別相當(dāng)于 a table, a break, a question, a Mexican carpet, a moment：

　　A table made of steel costs more than _______ made of wood.

　　A. one B. it

　　C. those D. which

　　Why dont we take a little break? Didnt we just have _____?

　　A. it B. that

　　C. one D. this

　　The question is _____ of great importance.

　　A. that B. it

　　C. one D. what

　　She wants a Mexican carpet, but she cant afford to buy ______.

　　A. one 　 B. it

　　C. them 　 D. the one

　　Meeting my uncle after all these years was an unforgettable moment, _____ I will always treasure.

　　A. that B. one

　　C. it D. what