For threequarters of its span on Earth, life evolved almost _______ as microorgani

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For threequarters of its span on Earth, life evolved almost _______ as microorganisms.

A precisely B instantly C initially D exclusively

参考答案:

D选[D]。所给四个副词的意思分别是:[A]准确地;[B]立刻,马上;[C]首要地;[D]唯一地,单独地。四个词只有exclusively才可以被almost修饰,而且也最符合句意。