黄铁矿矿石的主要成分为二硫化亚铁（FeS2），取一块质量为30克的黄铁矿矿石样品在氧气中完全灼烧后得到10克氧化铁（其中的铁全来自二硫化亚铁）同时生成二氧化硫。
阅读材料，然后从各小题所给的四个选项中选出一个最佳答案。
Found:
Is this your book? Please call John at 495-3456.
Lost:
My school ID card.
My name is Mike.
Please call 487-2349
Found: Is that your black schoolbag? Please call Mary. Phone#476-5939
Found: A set of keys. Please call Lily at 498-2456
Lost: My pencil case.
Blue and white, call Tom at 456-8700.
Found: A cat. Black and White. At the school gate.
Call: 412-9856.
