During the past 120 years, the world three waves of global economic integ
题型：不详难度：来源：
During the past 120 years, the world three waves of global economic integration（联合）.| A．witnessed | B．witnesses | | C．has witnessed | D．will witness |
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答案
| C |
解析
试题分析：考察时态。本题的关键在于during the past 120 years是与现在完成时连用，句意：在过去的120年里，这个世界已经经历了全球经济联合的三次浪潮。故C正确。
点评：时态题的考查关键是抓住句子的上下文含义和句中的时间状语。要根据时间状语来选择合适的时态，在平时的学习中要注意积累有关时态的用法和各种时态的特殊之处。如since， so far等经常与现在完成时连用。在条件状语从句中用一般现在时代替将来时等等。 |
举一反三
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