12. You'll regret ______ those words. You may hurt her feelings.

　　 A. say　　　 　　　　　B. to say　　　　　　　 C. having said　　　　 D. to have said

11. Though he failed, he tried _______ it again and again.

　　 A. to do　　　　　　　 B. doing　　　　　　 C. do　　　　　　　　 D. done.

10. You didn't hear us come back last night. That's good. We tried ______ noisy.

　　 A. to not be　　　　　 B. not to be　　　　 　C. being not　　　　　 D. not being

9. Remember ______ the book, when you have finished it.

　　 A. putting back　　 B. having put back　　 C. to put back　　　　 D. will put back

8. Some people's greatest pleasure is ______ .

　　 A. fishing　　　　　 B. to fish　　　　　　　 C. to be fish　　　　　 D. being fishing

7. It's very kind ______ you ______ say so.

　　 A. of, to　　　　　　　 B. for, to　　　　　　 C. to, to　　　　　　　 D. of, /

6. The old man's ______ pity on the snake led to his own death.

　　 A. take　　　　　　　 B. taking　　　　　　 C. being taken　　　　 D. have

5. It is no good ______ today's work for tomorrow.

　　 A. to leave　　　　　　 B. leaving　　　　　　 C. that you leave　　　 D. leave

4. It's no use______ with him. You might as well ______ with a stone wall.

　　 A. arguing, argue　　　 B. to argue, arguing　　 C. arguing, arguing　　 D. to argue, argue

3. I couldn't understand ______ at the poor child.

　　 A. you to laugh　　 B. you laugh　　 　　C. why laugh　　　　 D. you laughing