Though he is in his sixties, he works as hard as a young man A. yet B. but C. and ——青夏教育精英家教网—

摘要：Though he is in his sixties, he works as hard as a young man A. yet B. but C. and D. and yet

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Though he is in his sixties, ______ he works as hard as a young man.
A. yet 　　　　 B. but 　　　　 C. and 　　　　 D. and yet

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