单项选择题
A. They needed to count and calculate money. B. They needed to read and write. C. They needed to alert moving objects. D. They needed to hunt and farm.
A.fighting against global warming B.fighting against terrorism C.preventing money laundering D.political force reduction
A. He was wondering if the speaker was used to living in America. B. He was trying to show friendliness to the speaker. C. He wanted to keep their conversation going. D. He believed the speaker was a foreigner.