问题描述：
She bought the dress——she had first asked for.横线处为什么用that
She bought the dress——she had first asked for.
a who
b what
c that
d whom
请帮忙解释下为什么选THAT而排除掉了其他选项,最好能挨个说明下
She bought the dress——she had first asked for.
a who
b what
c that
d whom
请帮忙解释下为什么选THAT而排除掉了其他选项,最好能挨个说明下
问题解答：
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