21.____ that the train is gone, it is useless to wait.

　 A. Seen　　　　 B. Seeing　　　　 C. Having seen　　　 D. to have seen

20. We will go for a walk in the Grand Park tomorrow, weather___.

　A. permitting　　 B. to permit　　　　 C. permitted　　　 D. having permitted

18. The name Nebraska comes from the Indian word “nebrathka” , _____ flat water.”

　 A. to mean　　　 B. meaning　　　　 C. it means　　　 D. by meaning

19 ____ his answer, she sent a second letter.　　　　　　　　 A. Receiving not　

B. Not to receive　　 C. Not being received　　　　 D. Not having received

17. Anna was reading a piece of science fiction, _____ completely to the outside world.　　　 A. being lost　 B. having lost　　　　 C. losing　　　 D. lost

16. ____ all things into consideration , his life is a happy one.

　 A. Taking　　　 B. having taken　　　 C. Take　　　　 D. To take

15.The concert conducted by Karajan proved very _____.

　 A. exciting　　　 B. excited　　　　　 C. to excite　　　 D. being excited

14. The President was sitting on the chair____ by his supporters.

　 A. surrounding　 B. to surround　　　 C. surrounded　　 D. to be surrounded

13. The room is crowded , but there are____.

　 A. a few seats to leave B. few seats left　 C. a few seats left　 D. few seats to leave

12.--- How was the concert last night ?

　 --- It was____.

　 A. disappointing　 B. disappointed　　 C. disappoint　　 D. being disappointed

11.The teacher came in with many students_____.

　 A. following　　 B. to follow　　　 C. followed　　　 D. being followed