单项选择题
A.hindered B.imposed C.happened D.hit
A. the part that birth plays B. the importance of their positions C. the role of environment on intelligence D. the importance of their intelligence
A. They feel they are of use to other people. B. They want to set an example to their children. C. They think it is their duty to help their relatives. D. They hope they deserve care when they need it.