My best friend, Tom, should ______ me ______ to my boss, which hurt me deeply.
34. People in China are proud of _____ we have achieved in the past ten years.
33. Walking through the park, _____.
32. ---Why on earth didn’t you answer the phone? ---I’m sorry, but the doorbell _____ too.
31. _____ our earth, otherwise it will be no longer fit for us to live on.
30. ---They are quiet, aren’t they? ---Yes. They are accustomed _____ at meals.