---David has made great progress recently.
---______, and ______. Keep up the good work, Tom.A.So he has; so you haveB.So he has; so have youC.So has he; so have you
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B解析so+助动词、情态动词、be动词+主语（主语与上文不一致，表示另一人也这样）而so+主语+助动词、情态动词、be动词（主语与上文内容一致,表示上文中提到的那个人，的确是这样）故选根据意思可知