I must think of a proper gift for my mother, ________ won't be expensive but will make her happy.
A.who that
B.the one which
C.it
D.one that
网友回答
D解析该句意为“我一定要为母亲想出一个合适的礼物,一个不贵但能使她高兴的礼物”。此处选one相当于a gift,为泛指,不能选the one; that引导定语从句,修饰one。如选C项,应改为并列句…and it won't be…。