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③Seen from the top of the hill，the park looks more beautiful.＝When it is seen from the top of the hill，the park looks more beautiful. 从山顶往下看，这座公园看起来更加漂亮。 ④Encouraged by the progress he has made，he works harder. ＝As he is encouraged by the progress he has made，he works harder. 由于受到所取得进步的鼓舞，他工作更努力了。 ⑤He began to cry as if bitten by a snake. ＝He began to cry as if he was bitten by a snake. 他大叫起来，好像被蛇咬了。 【即境活用14】 ________twice，the boy was afraid to get close to the dog again. A．Being bitten B．Bitten C．Having bitten D．To be bitten [解析]句意：因为两次被咬，这个男孩不敢再靠近那条狗。过去分词作原因状语。主句主语the postman 与bite 构成被动关系，排除C项；D项为动词不定式作目的状语；A项表进行；B项表示之前两次被咬，故选B。 [答案]B 3．Follow it up，explore all around it，and before you know it，you will have something worth thinking about to occupy your mind. 跟踪下去，不断探索，不知不觉中，你就会发现某种值得思考的东西占据着你的头脑。 【考点归纳】 “祈使句＋and/then/or/otherwise＋陈述句”结构的用法。 ①Work harder and/then you will succeed in your studies. ＝If you work harder，you'll succeed in your studies. ＝Working harder，you will succeed in your studies. 如果你更加努力学习，在学习上你就会成功。 | 
