Life is everywhere around us. It is evident in the huming of 【1】______ insects, the singing of birds, the rustlings of smal

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问题     Life is everywhere around us. It is evident in the huming of      【1】______
insects, the singing of birds, the rustlings of small animals in the
underbrush. It exists in the icy polar regions and in patched deserts.【2】______
It is present from the sea’s sunlit surface to its darkest depths. High
in the atmosphere tiny creatures float about. Beneath our feet untold
trillion of microorganisms are                                     【3】______
on work in the soil, making it fertile for the growing of green    【4】______
plants, which sustain the other forms of life.                     【5】______
   Earth is packed with life so abundant and varied as to
staggering the imagination. How did it all start? This planet of ours【6】______
and all inhabitants—how did they come to be here? More            【7】______
particularly, how did humankind get started? Did we evolve from
apelike animals? And were we created? Just how did we get here?    【8】______
And what does the answer infer for the future? Questions like these【9】______
have been around for a long time and they still unanswered in the  【10】______
minds of many.
【M3】

选项

答案trillion — trillions

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