托??荚囌Z法指導(dǎo):語法問題之一

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新東方TOEFL系列教材語法部分: Exercise Twenty-Seven中
     28. Artist Berenice Abbott (studied)(A) sculpture: in New York City and Paris (before)(B)taking: (with)(C) (photography)(D) in the mid 1920's.
     此題答案為C,我想要改為to吧。
    下面讓我們看 一道與此題很相似的題:
     30. (Photographer)(A) Fred Miller was ceremonially (adopted into)(B) the Crow nation (because)(C): taking (hundreds of)(D) pictures of its members in the late nineteenth century.
     此題答案為C,為什么?
    because 后面加從句.改為because of. before 兩者都可。