一道关于时态语态的高二英语题Lucy is the best in our class,but recently Tom's grades have been getting better and better .Lucy's position _____.A.is being challenged B.has challenged 麻烦解释清楚一些.多谢啦~~

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一道关于时态语态的高二英语题Lucy is the best in our class,but recently Tom's grades have been getting better and better .Lucy's position _____.A.is being challenged B.has challenged 麻烦解释清楚一些.多谢啦~~

一道关于时态语态的高二英语题Lucy is the best in our class,but recently Tom's grades have been getting better and better .Lucy's position _____.A.is being challenged B.has challenged 麻烦解释清楚一些.多谢啦~~
一道关于时态语态的高二英语题
Lucy is the best in our class,but recently Tom's grades have been getting better and better .Lucy's position _____.
A.is being challenged B.has challenged
麻烦解释清楚一些.多谢啦~~

一道关于时态语态的高二英语题Lucy is the best in our class,but recently Tom's grades have been getting better and better .Lucy's position _____.A.is being challenged B.has challenged 麻烦解释清楚一些.多谢啦~~
选A.
句中有两个时间提示：
一是recently说明Tom在最近成绩才开始变得比Lucy好的；
第二个时间提示是现在完成进行时,说明最近的这个变化还在持续并没有结束.
“is being”是一种表示当下正在发生的状态而不是某人某事物一直有的特性,如She is being very rude.她表现得很粗鲁,（并不是说她这个人一直是粗鲁的人,而是当下的外部环境和心理因素导致她表现得粗鲁）.这和She is rude.她很粗鲁,是不同的,后者说明她是天生的粗俗.
所以选A,表示Lucy的地位正在受到挑战.
当然,还可以结合语态选答案,Lucy的地位是受到Tom的挑战,所以应该用被动语态.

Lucy是我们班成绩最好的学生，但是近来TOM的成绩越来越好。LUCY的地位受到了挑战。
选A， POSITION 抽象名词用单数，地位正受到挑战，所以用被动语态的进行时
B，是主动语态，不正确

A. 被动语态的正在进行时。露西的位置正在受到挑战。

选A
Tom's grades have been getting better虽然有个have，但是看have后面的been getting表示Tom的成绩已经越来越好了,是这种改变已经发生而不是已经改变好了。第一句Lucy is the best而不是was the best也可以说明现在仍然是lucy的成绩最好，只不过这种地位正受到威胁——is being challenged而不是...

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选A
Tom's grades have been getting better虽然有个have，但是看have后面的been getting表示Tom的成绩已经越来越好了,是这种改变已经发生而不是已经改变好了。第一句Lucy is the best而不是was the best也可以说明现在仍然是lucy的成绩最好，只不过这种地位正受到威胁——is being challenged而不是已经改变了。而且B选项表达也不对，应为has been challenged.

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