IV 根据汉语提示完成句子（25分）
61．汤姆又一次失业了，所以他不得不去寻找另一份工作。
Tom was ________ __________ ___________again, so he had to look for another job.
当他遇到困难时，总是找我来帮忙。
When he ________ __________ ____________，he always came to me for help.
她的一生都致力于教书。
She _________ _________ ___________teaching all her life.
我们应该与环境污染作斗争。
We should __________ ___________the environment pollution.
两国交战多年，人民深受其苦。
The two countries ________ ________ _________ _________for many years, and people there are suffering a lot.
那个年轻人走进森林去寻找神秘的花。
The young man went into the forest ________ ________ _________the mysterious flower.
以前他的学生对他的评价很高。
The teacher ________ ________ ________ ________ by his students in the past.
那个课程是开给那些想在国外教书的人的。
The course ________ _________ _________ those who wish to teach abroad.