A. got a large amount of money from their uncle B. used to make a living by fishing and were quite rich C. once lived in poverty D. gave up the search for the sunken treasure after they had a try 参考答案:C 答案解析:从最后一段最后一句there had never been a sick uncle可知[A]与事实不符。从第三段第三句“Their boat often leaked and their nets
第23题: [单项选择]A rocket might miss its target, by a "wide margin". This means the rocket missed the target ______. A. because of mechanical failure B. by a great deal C. by a small distance D. because the target moved 参考答案:B 答案解析:[解析] 本题可用排除法。A项“由于机械故障”，C项“距离短”，D项“因为目标移动”都不是文中所提原因。因此只有B项为正确答案。
