12. He could hardly move a step further. You can't imagine how he ______ to escape from the desert.

A. succeeded. B. tried　 C. kept D. managed

13. Are all Chinese textbooks ______ in your ______ house?

A. publishing … publishing B. published … published

C. publishing … published D. published … publishing

14. His actions ______ his love more than any words could.

A. tell B. express C. show D. mean

15. You should keep a secret of the things ______ here.

A. discussing B. being discussing C. being discussed D. to be discussing

16 They don't allow ______ in the building, but they allow me ______ out of it.

A. to smoke … smoking B. smoking … smoking

C to smoke … to smoke D. smoking … to smoke

17. Never ______ faith in himself, the scientist went on with his research.

A. to lose B. lost C. losing D. lose

18. When Lu Xun saw that many people in China suffered diseases, he decided ______ a doctor.

A. to become B. becoming C. to turn D. turning

19. you want to do in your life, you must believe that you can be successful.

A. What B. How C. Now matter what D. No matter how

20. The travellers preferred to stay in their own tent (帐篷) the night in the expensive hotel on the top of the mountain.

A. rather than to spend B. to spending C. rather than spending D. rather than spend