Đọc và chọn đáp án A,B,C,D cho phù hợp chỗ trống trong đoạn văn sau. 
Parents often have dreams for their children's future. They hope their children will have a (17) _____life than they had. They dream that their children will do things that they couldn't do. Parents (18) _____come to the US from foreign countries hope their children will have better education here. They think their children will have more career choices and more (19) _____lives. They make many sacrifices (20) ______they want their children to have more opportunities. They think their children will remain close to them because of this. Some children understand and appreciate these sacrifices and remain close to their parents. However, other children feel ashamed that their parents are so different from other Americans. 
17. A. more               B. worse          C. better            D. farther 
18 A. who                  B. whose         C. which            D. whom 
19. A. successfully     B. succeed     C. successful     D. success 
20. A. so                     B. since          C. when             D. but