22. In the dream Peter saw himself ________ by a fierce wolf, and he woke suddenly with a start.

A. chased　　 B. to be chased　　 C. be chased　　 D. having been chased

21. ______ the employees’ working efficiency, the supervisor will allow them to have a coffee break.

　 A. Improving　　 B. To improve　 C. Having improved　　 D. Improved

19. The parents suggested _______ in the hotel room but their kids were anxious to camp out during the trip.

　 　A. sleep　 B. to sleep　　 C. sleeping　　 D. having slept

20 There are hundreds of visitors _______ in front of the Art Gallery to have a look at Van Gogh’s paintings.

　 　A. waited　 B. to wait　　 C. waiting　　 D. wait

18. Helen had to shout ________ above the sound of the music.

A. making herself hear 　　　　　B. to make herself hear

C. making herself heard 　　　　　D. to make herself heard

17. Having been attacked by terrorists, ________ .

A. doctors came to their rescue 　　　　B. the tall building collapsed

C. an emergency measure was taken 　　D. warnings were given to tourists

16. The disc, digitally ______ in the studio, sounded fantastic at the party that night.

A. recorded 　　　B. recording　　 C. to be recorded 　　D. having recorded

15. The flowers ________ sweet in the botanic garden attract the visitors to the beauty of nature.

A. to smell　　　 　B. smelling 　　　　C. smelt 　　　　　D. to be smelt

14. The flu is believed ________ by viruses that like to reproduce in the cells inside the human nose and throat.

A. causing 　　　B. being caused 　　C. to be caused 　　　D. to have caused

13. ________ by the beauty of nature, the girl from London decided to spend another two days on the farm.

A. Attracting 　　　　　　B. Attracted 　　　　　

C. To be attracted 　　　　D. Having attracted

12. Having been ill in bed for nearly a month, he had a hard time _______ the exam.

A. pass 　　　　　B. to pass 　　　　C. passed 　　　　　　D. passing