There is an obvious __________ between the cultures of the West and East.
| A．content | B．contrast | C．contract | D．Contact |
34. People in China are proud of _____ we have achieved in the past ten years.
| A．that | B．which | C．what | D．How |
33. Walking through the park, _____.
| A．the trees look beautiful | B．he saw the beautiful trees |
| C．and he saw the beautiful trees | D．the tree was seen by him |
32. ---Why on earth didn’t you answer the phone?
---I’m sorry, but the doorbell _____ too.
| A．is ringing | B．was ringing | C．rang | D．was about to ring |
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 |