单项选择题
A．Yes, thanks B．No, not necessary C．No, thanks D．I don't care
A.it is not easy to have a friendly relationship with people when there is a marked difference in age and background B.the degree of friendship between two people and the reason for their shared interest can vary greatly C.friends need to know all these things D.these are the most important factors to make friends
A.all those who get on well with each other are friends B.every student has 6 friends C.everyone understands clearly how to make friends D.friends are closer than people who just get on well with each other