阅读下面材料,在空白处填入适当的内容(1个单词)或括号内单词的正确形式。
( A student is talking with Professor Michael on friendship. )
S= student; M=Michael
S: Professor Michael, nowadays many 1. (teenager) can’t get along well with their friends. I’d appreciate 2. if you can give us some suggestions.
M: Ok. First, friends with the same interests should be 3. (choose). Second, you should keep in touch 4. each other and sometimes you can tell him everything. Third, a real friend is always 5. (concern) about you. When you are in trouble, he can be the first 6. (give) you a hand.
S: I see. But friendship gradually 7. (change) as we get older. What can we do with it?
M: Of course, every coin has two sides, 8. there is no doubt that friendship means giving more, and good friends should be 9. (reliable) than other common friends even though they have disagreements.
S: I 10. (entire) agree with you.