阅读下列短文，从每题所给的四个选项(A、B、C 和 D)中，选出最佳选项，并在答题卡上将该项涂黑。
A
Black Valley, 63 kilometers from downtown Chongqing, is one of the best preserved natural wonders around the municipality. The national 5A-level scenic spot is a popular summer resort for sightseeing, forest adventures, outdoor camping, hunting and angling.
Located in Heishan town, Wansheng Economic Development Zone, the scenic spot spans over 103 square kilometers, 97 percent of which are covered by primitive forests. With over 110,000 negative oxygen ions in each cubic centimeter of air, it is dubbed as a natural oxygen bar and “the most beautiful healthcare-themed valley.”
Black Valley is also known as “the natural gene bank of Chongqing and Guizhou regions” for the diversity of its rare plants and wildlife, including Cathaya argyrophylla, Davidia involucrata, Trachypithecus francoisi and clouded leopards.
Scenic spot level: AAAAA
Address: Heishan town, Wansheng Economic Development Zone, 63 kilometers from downtown Chongqing
Opening hours: 8:30 am - 3:30 pm (peak season from November to February), 9:00 am-3:00 pm (off season from March to October)
Ideal sightseeing season: from May to September
Ticket price: 60 yuan ($8.72) during off season and 100 yuan during peak season, sightseeing bus and cable not included.
Notes:
1. It is recommended that tourists start from the higher southern area for a downward journey.
2. The average temperature is 18.1 degrees.
3. It’s a good idea to experience the local folk culture of the Miao ethnic group, especially when you choose to visit in May when the traditional Caishan Festival of Miao ethnic group is celebrated.
21．What can we know about Black Valley?
A．It lies in downtown Chongqing. B．Plants and wildlife are rarely seen there. C．A visit there costs at most 100 yuan.
D．The air is very high in negative oxygen ions there.
22．A best time for a visitor and lover of the folk culture to Black Valley is in .
A．January. B．March. C．May. D．July.
23．Which section is the text taken from in a newspaper?
A．Culture. B．Travel. C．Nature. D．Wildlife.
