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.thatB.he

C.oneD.which

【陷阱】幾個干擾項均有可能誤選。

【分析】此題答案選C，one 相當于 a student。類似地，以下各題也選one，它們分別相當于 a table, a break, a question, a Mexican carpet, a moment(from www.網(wǎng)址未加載)：

(1) A table made of steel costs more than _______ made of wood.

A.oneB.it

C.thoseD.which

(2)“Why don’t we take a little break?” “Didn’t we just have _____?”

A.itB.that

C.oneD.this

(3) The question is _____ of great importance.

A.thatB.it

C.oneD.what

(4) She wants a Mexican carpet, but she can’t afford to buy ______.

A.oneB.it

C.themD. the one

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

A.thatB.one

C.itD.what