将下面的简单句合并成一个复合句(并列句.定语从句.非谓语动词和状语从句) He was very knowledgeable．But he didn’t kno
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将下面的简单句合并成一个复合句(并列句，定语从句，非谓语动词和状语从句)
He was very knowledgeable．But he didn’t know how to answer it．
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解析：Though he was very knowledgeable, he didn’t know how to answer it． |