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Some Old Truths to Help You Overcome Tough Times
Unfortunately, life is not a bed of roses. We are going through life facing sad experiences. Moreover, we are grieving various kinds of loss： a friendship, a romantic relationship or a house. Hard times may hold you down at what usually seems like the most inopportune time, but you should remember that they won' t last forever.
When our time of mourning is over, we press forward，stronger with a greater understanding and respect for life. Furthermore, these losses make us mature and eventually move us toward future opportunities for growth and happiness. I want to share these old truths I've learned along the way.

本段首句中主句部分try to focus on the present moment是一个祈使句，表达了作者强烈的语气，因此应重点关注。下文还出现了 focus on the present moment的同义表达value thepresent moment, 同时present 一词在本段中多次复现。由此可判断E选项为正确答案。