1 . This was ________ ________ (无疑) the reason behind the invention of the wheel in ancient times, which much later developed into the car. （根据汉语提示完成句子）

2 . The senior engineer is a man of wisdom, who is in charge of directing the building of the subway. (同义词替换划线词)
The ________ engineer is a man of wisdom, who is in charge of directing the building of the subway.

3 . 人们发现很多濒危动物被日夜保护着。(watch over)
People found many endangered animals ________ day and night.

4 . 我以为他已经把这个决定告诉你了。
I thought he __________you about the decision.

5 . So, if you want to see a show that combines music, singing, drama, poetry and costume design with explosive effect, The Revenge of Prince Zidan ______ ______ ______ ______ ______ (如愿以偿)! （根据汉语提示完成句子）

6 . Before experiencing The Revenge of Prince Zidan, I wasn’t sure if I would enjoy it. But, in fact, I was ______ ______ ______ ______ ______ ______ (极为激动). （根据汉语提示完成句子）