导读：词组能有效的帮助大家提高完型和句子的理解与写作质量，为保证大家能够灵活运用考研重点词组，社科赛斯李梅老师特配以相应的例句，帮助大家更快地获得更高的分数。
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86. before long 不久以后
Before long he rebuilt a strong army and defeated the enemy.
不久之后，他重新建立了一支强大的军队并打败了敌人。
87. belief in 对...的信仰，相信
You need an undying belief in your own ability.
你要坚定不移地相信自己的能力。
88. be beneficial to 对...有益，对...有利
It can be beneficial to share your feelings with someone you trust.
向自己信任的人倾诉感情是很有益处的。
89. beyond question 毫无疑问
It’s beyond question that she will succeed.
毫无疑问，她会成功。
90. be blind to 对...视而不见
All the time I was blind to your suffering.
一直以来，我都没有意识到你遭受的痛苦。
