问题
选择题
The last thirty years _________ the quick development in almost every field in China.
A．saw
B．had seen
C．have seen
D．would see
答案
答案：C
考查时态。根据句意用一般现在时。句意：上一个30年已经见证了中国几乎各个领域的迅速发展。
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