若x²﹣y²=30，且x﹣y=﹣5，则x+y的值是 [ ]

A．5

B．6

C．﹣6

D．﹣5

“It is declared that this shipment does not contain any wood packing materials．”与这句话意思接近的是 （）

A．We declare that no wood packing material was used in this shipment

B．No declaration was made whether wood packing materials had been used or not

C．If you don’t make any declaration，we will not use any wood packing material

D．We will not use any wood packing material since you have prodded us a declaration of no-wood pack- ing material