题目

 Children are ____________to meet with setbacks as they grow up, so their parents don’t have to worry about it. A. possible                     B. due              C. necessary                D. bound 答案：D14、如图，CD是⊙O的直径，A，B是⊙O上的两点，若∠ABD=20°，则∠ADC的度数为70°．