17. ____ more than 80% of children in developing countries go to primary school, about 115 million children are not being educated.

A. When B. However C. Although D. Unless

18. The number of people invited ____ fifty, but a number of them ____ absent for different reasons.

A. were; was B. was; was C. was; were D. were; were

19. Confucius is the philosopher ____ influence has been the greatest.

A. which B. whose C. where D. when

20. This is the day ____ we visited Hong Kong.

A. by which B. by that C. where D. on which

21. His new book ____ next month.

A. will be published B. is publishing

C. is being published D. has been published

22. The things talked about in this report ____ over a year ago.

A. had taken place B. took place

C. have taken place D. were taken place

23. We were surprised ____ the temple still in its original condition.

A. finding B. to find C. find D. to be found

24. Tom was disappointed that most of the guests ____ when he ____ at the party.

A. left;had arrived B. left;arrived

C. had left;had arrived D. had left;arrived

25. When she woke up, she found that her house ____ by the thunderstorm.

A. was destroyed B. destroyed

C. had been destroyed D. had destroyed