As regards the development of moral standards in the growing child, consistency is very important in parental teaching. To forbid a thing one day and excuse it the next is no foundation for morality (道德). Also, parents should realize that "example is better than precept". If they are not sincere and do not practice what they preach (说教), their children may grow confused when they grow old enough to think for themselves, and realize they have been 
to some extent fooled.
A sudden awareness of a marked difference between their parents' principles and their morals can be a dangerous disappointment.
1. Eagerly watching the child’s acquisition of new skills, _________________.
A. should be forbidden
B. is universal among parents
C. sets up dangerous states of worry in the child
D. will make the child lose interest in learning new things
