Martha's blog also helped to improve meals at her school. One day she wrote: As we waited for dinner we were told that we are allowed to eat as much fruit and bread as we want.

　No one knows what will happen to Martha's blog in future. But already this little girl has helped to change the eating experience of many children just by sharing on the Internet pictures of her school meals.

25. Martha wrote about her school meals on her blog to _____.

A. invite students to judge the food B. show the terrible taste of the food

C. express her opinion about the food D. ask the school to improve the food

26. The organization Mary's Meals _____.

A. was set up by Martha B. provides free school meals

C. is an international organization D. helps poor families build kitchens

27. Why did the school officials want to prevent Martha writing her blog?

A. It had a bad influence on her study. B. Some people were upset by its content.

C. Taking pictures needs a lot of time. D. Many other students started to copy her.

　According to the Macmillan English Dictionary, alien is a word used to refer to a person or creature from a planet other than Earth. Aliens are beings that are believed to exist by many people. Is there evidence that aliens are real? Let us find out.

　Aliens have often been in the news. They have always been surrounded (包围) by mystery and interest of people all around the world. Some people have claimed (声称) to have been taken away by aliens. Some have claimed to have actually seen them. But there has been no certain evidence for the idea that aliens exist.

Alien sightings have mostly involved sights of ape-like (类猿的) creatures or humanlike figures seen in the dark. At times, some people have even found blood or