Complete each of the sentences with an appropriate preposition.
1. A selfish person is incapable __________ true friendship.
2. He was accused _________ being disloyal _________ the government.
3. How much time do you spend ________ homework?
4. Good friendship should be based ______ mutual understanding.
5. Do you keep in touch _________ any school friends?
6. Some adults have a total lack ______ sympathy _______ young people.
7. He's more concerned ______ what people think about him than anything else.
8. She had been briefly acquainted ______ him more than 20 years earlier.
9. She thought _________ him very often.
10. Some people take __________ interest with enthusiasm, but they are soon tired ________it.