问题描述：
一道SAT语法improving sentences的题
Remarkable breakthroughs in gene research may lead to dramatic changes in medical (treatment,where it may be possible to create drugs tailored to a patient's genetic makeup.)
(A)~
(B)treatment,in which they can possibly create
(C)treatment by making it possible to creat
(D)treatment that makes it possible to create
(E)treatment taht makes possible creating
答案选的C,我选的B.我不知道C中it指代什么成分,而且感觉B没有错误.
Remarkable breakthroughs in gene research may lead to dramatic changes in medical (treatment,where it may be possible to create drugs tailored to a patient's genetic makeup.)
(A)~
(B)treatment,in which they can possibly create
(C)treatment by making it possible to creat
(D)treatment that makes it possible to create
(E)treatment taht makes possible creating
答案选的C,我选的B.我不知道C中it指代什么成分,而且感觉B没有错误.
问题解答：
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