问题补充:
The wide spread of super hybrid rice around the world the lives of millions and millions of people suffering from hunger to a great level.
A. has improved
B. is improving
C. improved
D. has been improving
答案:
(答案→)A. has improved
B. is improving
C. improved
D. has been improving
解析:考察时态.句意:全世界广泛推广的超级杂交水稻提高了数百万经受饥饿的人们的生活到了一个很高的水平.可知描述的是到现在已完成的动作,主语为抽象事物,不可数,并且是动作的发出者,故用现在完成时主动语态,选A.
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