摘要：13．-The project has been held up by a sudden change in temperature for a week. -I’m afraid the terrible weather will for some time. A．keep back B．keep up C．keep out D．keep on 答案 B 解析 考查动词词组意思辨析.A项keep back“扣下,忍住.抑制住 ,B项keep up“持续,保持 ,C项keep out“禁止入内 ,D项keep on“继续(做),继续留用 .只有B项符合语意.

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