单项选择题
Questions 23 to 26 are based on the conversation you have just heard.
A. He took a tour of the city. B. He read about it. C. He wrote an article about it. D. He worked there as a guide.
A. Survival strategies for extreme Antarctic cold. B. Why inactive volcanoes become active. C. The principal causes of global warming. D. The effects of volcanoes on the Antarctic ice sheet.
A. To encourage people to participate in a club activity. B. To introduce a new kind of bicycle. C. To inform bicycle beginners about New Jersey’s traffic laws. D. To warn tourists about bicycling on the roadways.