—How long have these archaeologists stayed in this village?（ ）
—Not long, just ________ this Monday.
A. on B. until C. after D. since
—How long have these archaeologists stayed in this village?（ ）
—Not long, just ________ this Monday.
A. on B. until C. after D. since
D
考查介词。依据问句可知是现在完成时，而A、B、C三个选项都不能与现在完成时连用，只有since与过去时间点连用时用现在完成时，故D正确。