In some countries, many students participate in various programs, _______ they learn about the sense of responsibility by volunteering their services.
| A．which | B．when | C．where | D．that |
29.Everyone wants to live in a beautiful, comfortable and “livable ” place, but not ________ know where it is.
| A．some | B．either | C．all | D．Both |
28.The comedy Tooth Fairy is based on the story all western children know: If a kid leaves a tooth under their pillow, they’ll receive a visit from the tooth fairy, who takes the tooth and leaves a gift ________.
| A．in general | B．in exchange | C．in total | D．in common |
27. Nearly four hundred supermarkets in Beijing are preparing to dim their lights ________ the "Earth Hour 2010" on Saturday night.
| A．honor | B．honoring | C．to honor | D．having honored |
26.Younger adults who get either little sleep or a lot of it ________ see a greater expansion in their waistlines over time.
A. may B. must D. need D. Shall
25. ________ theme of the Shanghai Expo is “Better city, better life”. It will send _____ message to people around the world to care about the places where they live.
| A．/…a | B．the…a | C．a…the | D．/…the |