19.　 The patients were o__________ over a period of several months.

18.　 You can use my computer on c_________ that you take good care of it.

17.　 It’s hard to a____________ your goal without working hard.

16.　 He graduated from a famous foreign language i___________.

15.　 It was raining hard yesterday. I think there was no p______ that they climbed the mountains.

14.　 The patient is seriously ill and is being kept under continuous o___________ in hospital.

13.　 To our great d__________, it rained on the day of the sports meet.

12.　 --- Are you sure you have enough money to run a company?

--- Not very sure. And I will take it into a___________.

11.　 When she studied in Peking University, she was a___________ a scholarsip every year.

10.　 The little girl felt very t___________ when she was left alone in the house.