Tsinghua University, founded in 19 1 1, is the cradle of many outstanding figures. Found is established. In this question, as a non-predicate verb, it means passive and complete, so C is chosen.

Comments: There are many non-predicate verbs in the college entrance examination, and such questions are difficult. Master the following knowledge: doing indicates the purpose and future; Watch-making is active and accompanying; The completion table is passive and complete. The answer steps at the same time are: 1. Judge whether it is a non-predicate verb and see if there are conjunctions. 2. Find a logical theme. 3. Judge the relationship between logical subject and non-predicate verb. 4. See if the non-predicate verb action occurs before the predicate action of the main sentence. If so, use the perfect form.