题目

I went to India for a 2-week vacation to visit my relatives. We stopped on a red light, and as always, there were a lot of activities outside the cars near the   41   . People walked in, between the cars    42    newspaper, water and a number of kids looked for a bit of charity from the car owners. It’s a familiar   43   in most poor developing countries.                      While we were   44   for the red light to turn green, I noticed a man outside a couple of   45   in front of ours trying to sell bottles of water. It’s    46   u能在氧气中燃烧且生成白色固体的物质是（　　）A．铁丝B．木炭C．红磷D．硫粉