I often watch CCTV-9, ________ I have learned a lot of new words and expressions.
| A．from which | B．of which | C．to which | D．which |
31. _____ our earth, otherwise it will be no longer fit for us to live on.
| A．Protected | B．To protect | C．Protecting | D．Protect |
30. ---They are quiet, aren’t they?
---Yes. They are accustomed _____ at meals.
| A．to talk | B．to not talk | C．to talking | D．to not talking |
29. _____ the project as planned, we’ll have to work two more hours a day.
| A．Completing | B．Complete | C．Completed | D．To complete |
28. --- Is Bob still performing?
--- I’m afraid not. He is said _____ the stage already as he has become an official.
| A．to have left | B．to leave | C．to have been left | D．to be left |
27. ---Ken, why do you look so tired?
---I _____ myself _____ the climate since I came here.
| A．hadn’t adapted; to | B．haven’t adapted; to |
| C．don’t adapt; from | D．didn’t adapt; from |