Aluminum isn’t found free in nature, owing to its always ____ with other element

Aluminum isn’t found free in nature, owing to its always ____ with other element

题型:不详难度:来源:
Aluminum isn’t found free in nature, owing to its always ____ with other elements, most commonly with oxygen.
A.being combined B.having combined
C.combine D.combined

答案
A
解析

试题分析:combine …with…与……结合;这里owing to中的to是介词,故它的后面应跟动名词,这里是its+动名词也就是动名词的复合结构。又因为its与combine之间是被动关系,故用being combined。句意:在自然界中发现的铝不是自己存在的,因为铝和其它元素结合在一起,通常情况下是和氧在一起。故选A。
点评:本题较难。不容置疑,高考将继续加强对非谓语动词的考查,试题的特征将继续呈现出“情景化”和“设问角度的多样化”的趋势,但试题的难度将会有所控制。
即学即练:______from other continents for millions of years, Australia has many plants and animals not found in any other country in the world.
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