题目

I've lived in three Asian cities,and they all surprised_61_(I) on the upside.In the case of China,here's_62_I like it. It's modern and continues to develop all the time.They have modern_63_(city),and excellent transport facilities, including their unmatched high-speed train network.They have excellent hotels,restaurants,and beautiful parks etc. There's a feeling of safety and_64_(free) in Chinese cities.There's no need to tell you what to do and you can see from the behavior of the diverse crowd.People just do_65_they want.In most places no policemen_66_(see).Do you know that police in 已知{an}是递增数列，且对任意n∈N*都有an=n2+λn恒成立，则实数λ的取值范围是（ ）A．（-，+∞）B．（0，+∞）C．[-2，+∞）D．（-3，+∞）