that it ranks 40 in the world .
A. So many talents has Tsinghua University produced
B. Such many talents has Tsinghua University produced
C. So many talents Tsinghua University has produced
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解析： 考查so…that结构。和many连用时，要用so,不用such，所以排除B；且so…that结构，so置于句首时，so引导的主句要部分倒装，所以选A。