1. 选词填

that, why, whether, as if, where, because, when

1. （1） The question discussed at the meeting was the method was worth trying.
3. （2） A true friend indeed isoffers help without waiting to be asked.
5. （3） The last time we had great fun waswere visiting the water park.
7. （4） All this was over twenty years ago, but it isit were only yesterday.
9. （5） What we are learning isthe method is used to solve this kind of problem.
11. （6） According to legend, this place isZhuge Liang prayed for wind.
13. （7） The turning of the earth on its own axis ismakes the change from day to night.
15. （8） He has been smoking too much. That is he has heart disease.
17. （9） I'm a bit sleepy, and it'sI stayed up all night to prepare for the final exams.
19. （10） Puzzles have been popular for centuries, and perhaps the best thing about them is they teach while they entertain.