________to the English programs more often and you'll be able to improve your listening.A.If you listenB.When you listenC.ListeningD.Listen
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D解析and或or连接两个并列分句，前一分句为祈使句，后一分句为陈述句。“祈使句+and”等于“if”，前后句语义相顺接；“祈使句+or”等于“if not”，前后句语义相反，如：a）Work hard, and you'll succeed. b）Work hard, or you'll fail. 用and连接时，前面的祈使句也可仅用名词，后句的动词也可用过去时态，如：a）One more word, and my lesson is over. b）A few minutes, and they went away.