赖水信's高分TOEFL文法中说that作为关系代名词前不可加介系词.(P.82)

　　 for example:This　is the house in that he lived.(False): But when I was doing TOEFL 89.8 section2 question 15,I met with: such a problem:Anthropology　is a science__anthropologists use: a rigorous set of methods and techniques to document: observations that can be checked by others.

　　 A. in that B.that in C.that D.in

　　 Considering what has been said in that book I chose C,but the

　　 correct answer is A.

　　 I am very puzzled.

　　in that 这里作because解。

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