所处地区年平均雷暴日数大于或等于（）的通信导航监视设施，雷电保护等级为特级。
A.60d
B.70d
C.80d
D.90d
参考答案：C
We don’t believe the baby is badly ill,__________?
A．do we
B．is he
C．is it
D．isn’t it
Companies give their products to film stars fans will buy them.[ ]
A. because
B. because of
C. so that
D. in order to
