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Great as Newton was, many of his ideas______today and are being modified by the work of scientists of our time.
Great as Newton was, many of his ideas______today and are being modified by the work of scientists of our time.
admin
2014-05-14
77
问题
Great as Newton was, many of his ideas______today and are being modified by the work of scientists of our time.
选项
A、are to challenge
B、may be challenged
C、have been challenged
D、are challenging
答案
C
解析
时态。challenge意为“挑战,怀疑”,常用作及物动词。本句中牛顿的观点受到挑战为一个当前已经发生的事实,故采用现在完成时的被动语态。
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专业英语四级
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