It’s getting late. We must "be off" now. Which of the following can’t replace the underlined part?
| A．begin | B．be leaving | C．start | D．go |
．We can never expect _________ bluer sky unless we create _________ less polluted world.
| A．a；a | B．a；the |
| C．the；a | D．the；the |
Huangshan is ________ most beautiful tourist site and I want to visit it ________ second time next month.
| A．the；the | B．the；a |
| C．a；a | D．a；the |
He was elected________president of the company，and________news came，in fact，as________surprise.
| A．a；the；/ | B．/；the；a |
| C．a；/；the | D．the；the；a |
Sometimes she talks with Mary over ________ telephone，that is to say，they keep in touch with each other by ________ telephone.
| A．the；/ | B．/；/ |
| C．/；the | D．the；the |
As is known，it was Hu Jintao，________ president in our nation，who gave ________ lecture at the opening ceremony of the Beijing 2008 Olympic.
| A．the；a | B．the；/ |
| C．a；the | D．/；a |