【问】 The search for the missing airmen was successful.(《远东英汉大辞典》)
 在名词search(搜寻、寻找、探求)之后是不是只能用介词for?
 【答】 在名词search(搜寻、寻找、探求)之后大都跟介词for：
 1. The search for the little girl went on all day. (JED)
 寻找小女孩的活动进行了一整天。
 2. The search for the missing man has not been successful. (Palmer)
 搜寻那个失踪的人的努力未获成功。
 3. The police are making a search for the missing woman. (Crowell)
 警方正在寻找这名失踪的妇女。
 但是，在名词search之后也可使用介词of：
 1. I began a systematic search of the place. (Wells)
 我开始对这个地方进行有计划的搜寻。
 2. A search of the apartment produced several unregistered guns. (FWF)
 搜查这套房间时发现几支未登记的枪支。
 但是，下面的用法是固定的：in search of，on a search for，in one’s search for。
 1. They started off at once in search of the missing girl. (Doyle)
 他们立即出发寻找那丢失的女孩。
 2. He glanced about as if in search of something. (Wilde)
 他向四周扫视了一下，好象要找什么东西。
 3. They set out on a search for burried treasure. (Wood)
 他们开始搜寻埋在地下的财宝。
 请做下面的英语试题：
 Geologists use artificial earth shocks____the kinds of rock in which petroleum accumulates.
 A. they search for them in B. in their search for
 C. search for them in D. in search for their(TOEFL，87. 1)