Yellowstone Weather
Yellowstone National Park is at high altitude（海拔）．Most of the park is above 7,500 feet （2,275meters）．
Yellowstone's weather is unpredictable．In summer, it may be warm and．sunny with temperatures in the high 70s．At night in any given month, the temperature may drop close freezing．So it is best to come prepared for cold evenings and mornings, especially if you are camping or hiking．When you leave your campsite, please leave it prepared for possible thundershowers and wind．
A sunny warm day may become fiercely stormy with wind, rain, sleet and sometimes snow．Without enough clothing, an easy day hike or boat trip can turn into a battle for survival.
72．The author writes this passage most probably for those who plan to ____ in Yellowstone National Park．
A．do, research, work． B．take a business trip．
C．have sports games D．spend their holidays or take a tour
73．Which of the following best describes Yeltowstone's weather?
A．Yellowstone's weather is generally changeable and it snows most at the year．
B．It's neither too hot in summer nor too cold in winter．
C．Weather in fall is pleasant and temperatures never fall below freezing．
D．It's pretty warm in the day and very cool at night throughout the year．
74．If you are planning to spend your holidays in Yeilowstone National Park in summer,, what should you take with you?
A．Just some light clothing such as T-shirts or skirts．
B．Just some warm clothing such as sweaters and coats．
C．Both light clothing and warm clothing．
D．Either light clothing or warm clothing．
75．What does the underlined word "readings" refer to?
A．literature works B．books
C．announcements D．figures