The thoroughly ________ teacher, who has just retired from teaching, is said to _______ a lot of hardships during those ten years.A.experienced; experienceB.experiencing; have experiencedC.experienced; have experiencedD.experiencing; experiencing
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C解析本题前一空应填入形容词来修饰名词teacher；后一空应用不定式的完成式，表示该动作在is said之前。