C.He had been told many times
D.Though he had been told many times
解析:考查前后主语保持一致。题中有连词but,故前后须是完整的句子。Though不能与but同时使用,故选C,句意:虽然他被告诉了许多次,但是他仍然不能理解。 本题选C。 {02}一Why didn’t you try your best to get on the bus? 一I tried to,but ______ I could,it started moving.
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