将下列句子翻译成英文

1.他尝试过多种工作，最后当了一名教师。（in the end) He had tried many kinds of jobs and in the end he became a teacher. 2.杰克花了差不多一星期的时间完成这篇文章。（spend..doing) Jack spent almost a week's time (in) finishing this article. 3.这座城市的人口数量持续增长。（continue to do sth) The population of this city is continuing to increase. 4.他的梦想是成为一名医生。（动词不定式作表语） His dream is to be a doctor.