根据下例各个句子的要求，完成、改写或翻译句子。
【小题1】I can’t help (亲他) (每当) I see my son.
【小题2】All the afternoon, I worked in the lab (窗户开着).
【小题3】The problem (在会议上谈论的) yesterday was very difficult to solve.
【小题4】In modern society cell phones (取代了信件) in munication.
【小题5】He will never forget his first time to take a train. (改为倒装句)
【小题6】从山顶上看，这个城市看起来像一个大花园。 (用过去分词短语做状语)
kissing him, every/ each time
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(答案→)kissing him, every/ each time
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