题目内容

【题目】 Jim often goes to school 7:00 the morning.

A. at; on B. at; in C. in; at D. in; on

【答案】B

【解析】

试题分析：句意：Jim经常在早上7点去上学。at在具体的时刻；on用于具体某一天的前面；in在上午、下午或晚上。at 7:00在7点；in the morning在早上。故选B。

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Would it surprise you to learn that, like animals, trees can communicate with each other and pass on their wealth to the next generation---their young trees?

Suzanne Simard, forest ecologist(生态学家) at the University of British Columbia, explains how trees are much more complex(复杂的) than most of us ever imagined. Although Charles Darwin(达尔文) thought that trees are competing for survival of the fittest, Simard and her team have made a new discovery and showed just how wrong he was. In fact, the opposite is true: trees survive through their group work and support, passing around necessary nutrition(营养) such as nitrogen(氮) and carbon “depending on who needs it”.

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