请根据中文及括号内的提示翻译下列句子

小题1:It is a well known fact that cigarettes contain many chemicals which will affect your health.

或It is well known that cigarettes contain many chemicals which will affect your health.

或As is known to all, cigarettes contain many chemicals which will affect your health.

小题2:Although most people considered his goal to be unrealistic, he was sure that he could achieve it with hard work.

或Although most people considered that his goal was not realistic, he was sure that he could achieve it with hard work.

小题3:I don’t like to watch over my naughty niece every weekend, but my mother insists that I (should) do it.

小题4:Afterwards we agreed that above all the love and devotion of his fans had made his career successful.

小题5:Jack, with whom I went to the concert last night, has dreamed of being an attractive musician since he was admitted to the university.

或Jack, who/whom I went to the concert with last night, has dreamed of being an attractive musician since he was admitted to the university.