题目内容

With the development of production and science,radio a wide use in　　a short time.
A．foundB．findsC．have foundD．has found
D
该题考查动词的时态和主谓一致。本句陈述的是在极短的时间内，收音机得到广泛的应用，且此情况有延续下去的可能性，因此应该用现在完成时态。
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