▲题目的答案是对的，解析也是对的。当地点状语修饰带介词的动词短语时，它可以放在动词与介词之间，也可以把地点状语放在句末。所以下面两句都是可以的：

He told me to look in the cupboard below the sink for what I needed.

He told me to look for what I needed in the cupboard below the sink.

均表示：他叫我到洗碗池下面的柜子里找一找我需要的东西。

▲请看下面一道高考题，也属类似情况：

Before you pay a visit to a place of interest, look in your local library ______ a book about it. (2013安徽卷)

A. on           B. at             C. for              D. to

此题答案为 C。此句也可写成：

Before you pay a visit to a place of interest, look ______ a book about it in your local library.