问题描述：
[单选]
Television is an instrument of communication，（）us to see us as well as to hear the performer．
A．permitted
B．permitting
C．permits
D．being permitted
参考答案：查看无
答案解析：无
答案解析：无
上一篇：The vacuum tube， invented near the beginning of our century， gave us the use of radio waves， an energy source never before（）and later opened the road for television．
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