单项选择题

Questions 17-20 are based on the following monologue introducing the "Clovis first" theory. You now have 20 seconds to read Questions 17-20.
What is the alternative route of entry

A．The land bridge between Siberia and Alaska.
B．Western Canada.
C．Wales Island
D．The Pacific coast.

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单项选择题

单项选择题

Questions 17-20 are based on the following monologue introducing the "Clovis first" theory. You now have 20 seconds to read Questions 17-20. What is the alternative route of entry 您的浏览器不支持 audio 元素。