单选题 Now Mr. Smith is in the zoo with his two sons, one aged 14 and the other 10. How much are the tickets together?
【正确答案】 C
【答案解析】[解析] 从文章可知成人2美元,12岁以上儿童1美元,12岁以下免费,因此他们共 3美元。故本题答案为C。