1.A selfish person is incapable of true friendship.
2.How much time do you spend on homework?
3.Good friendship should be based on mutual understanding.
4.Do you keep in touch with any school friends?
5.Some adults have a total lack of sympathy for young people.
6.She had been briefly acquainted with him more than 20 years earlier.
7.Some people take up interest with enthusiasm, but they are soon tired of it.
8.She has learnt English for three years, and she is good at English now.
9.I wish Carol would take a holiday. It would be good for her health.
10.Mary always takes care of her children carefully.
11.It was very kind of you to help me with that difficult work.
12.You were very kind to me when I asked you for some help.