In a way，________ global warming is a challenge for man，so we must overcome it to build ________ fine world.
| A．the；/ | B．a；the | C．/；a | D．a；/ |
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 |
24.Toyota Motor President Akio Toyoda on Monday apologized to Chinese consumers , who ________ the world's biggest auto market , over the company's massive global recall.
| A．make up | B．bring up | C．put down | D．set down |
23. A salty diet may increase the risk of stomach cancer ________ 10 percent, South Korean researchers found in a study of more than 2 million people.
| A．at | B．to | C．by | D．For |
22.Some people are worrying about the possibility ________ cellphones could be responsible for a range of illnesses, from rashes to brain tumors.
| A．that | B．why | C．how | D．Whether |