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1._________________________（ 我刚刚到家 ） than the telephone rang.
2.The old man regretted __________________________（ 一事无成 ） in his life.
3.____________________（ 他五十多岁 ）, but he looks younger than his age.
4.Many big cities in the world ________________________（ 正面临淡水资源短缺 ）.
5.He said nothing, leaving me _____________________ （ 对他的计划毫不知情 ）.
答案与解析：
1. No sooner did I get home
2. being nowhere
3. He is more than fifty years old
4. are facing the problem of lack of water resource
5. having no idea about his plan
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