题目

阅读下面短文，从短文后各题所给的四个选项（A，B，C和D)中，选出可以填入空白处的最佳选项。 Not long before, my daughter's shoes were scratched (划破) with a knife. She burst into tears, so I took them to the shoemaker's. The young apprentice (学徒) glanced at the 1 and said, “Nothing I can do except 2 the upper.” His master looked at them and said, “If you 3 me, I will add more scratches on both the shoes.” I was 4 and asked why. He explained, “As if the openings were made 5 for a special style.” I didn't quite understand him,6 I decided to4．最近几十年，几乎每年至少一种或几种动物从地球上消失，造成这种现象的主要原因是（　　）A．自然灾害频发B．人类活动的影响C．动物无法适应环境D．各种传染病流行