31. I enjoy walking ________ the sides of the lake. It can make me forget unhappy things.

A. through        B. across               C. along                D. around

32. —Are those books ________?

—No, they are not mine. They belong to ________.

A. your; he          B. yours; her            C. your; hers       D. yours; she

33. I’m afraid there ________ a meeting at 3 pm. It’s a pity I can’t join you.

A. was             B. are                    C. has been      D. will be

34. Don’t ________too late. It’s bad for your health.

A. wake up        B. stay up             C. show up        D. turn up

35. —Sara, try to do everything to the best within your________.

— OK, I will.

A. ability                 B. habit                 C. power           D. attention