问题详情

Parents can no more be friends to their children than teachers can be to their students. For the essence of friendship is reciprocity(互惠): giving and getting something like 【C1】______ you give. Parents 【C2】______ to the proper development of their children, and teachers guide the shaping of their students" minds.
It should be 【C3】______ now why real friendship requires more than merely having"【C4】______ in common." It is what people have in common 【C5】______ determines the kind of friendship they will have. Real friendship requires at least a sound moral character out of the richness of which individuals are able to 【C6】______ this precious affection. The more individuals give, the more they realize a genuine kind of 【C7】______, the better friends they are. A good man will not only do for his friend what he would do for 【C8】______ but also, if necessary, do 【C9】______.
These prerequisites are hard to fulfill, true friendship is 【C10】______ to be rare. To acquire a real friend, 【C11】______,is one of the most praiseworthy accomplishments in 【C12】______. Montaigne tells a story of Cyrus, the 【C13】______of Persia. He was asked whether he would change a valuable horse, on 【C14】______ he had just won a race, for a kingdom. Cyrus replied, "No, surely, sir, but I would give him up with all my heart to gain a true friend, could I find out any man【C15】______ of that alliance."
ruler what see something give and get
that selflessness himself more bound
therefore life which worthy clear
【C1】______请帮忙给出正确答案和分析，谢谢！