i don't think d( ) are important

A don't;differences（用复数,因为后面是are）;in

课本很重要,但是没有东西能与真实的生活经历相比.

1,选A,因为该句不是并列结构,所以不能出现两个谓语动词,只能选A
2,因为句中前后两部分逻辑主语不同,所以前半部分省略谓语,用分词形式表示,构成独立主格结构.
3,account for
1.说明;证明
He could not account for his foolish mistake.
他无法解释他所犯的荒谬的错误.
2.对...负有责任
Who will have to account for the misprints in the dictionary?
谁必须对字典中的印刷错误负责?
answer for
1.对...负责
We all must answer for our actions.
我们都必须对自己的行动负责.
2.因...而受罚
You'll answer for your rudeness one day.
总有一天你会因你的无礼行为而受到惩罚.
竭诚相助,

animals

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A differences 是复数,与are搭配.