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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.

本段中fear一词多次出现, 贯穿整段, 说明fear是本段的主旨词，答案应该在D选项或F选项中选。Unfortimately转折后作者通过引用Will Smith的话以及自己的总结揭示了段落的主旨。根据 exaggerating fears“夸大的恐惧”，Fear is not real 以及 fears are just theproduct of our luxuriant imagination“惧只是我们丰富想象力的产物”，可以确定D选项为正确答案。