The only way to conquer a fear is to face it, and doing so as frequently as possible.
正确答案:doing应改为to do[解析] 此题考查and连接的并列结构。整个句子是不定式结构作表语，因此and前后均应为动词不定式。
答案解析:有
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The only way to conquer a fear is to face it, and doing so as frequently as possible.
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