1. 阅读理解

Do you think animals can see colors? Scientist(科学家) think that many animals cannot see colors. The world is black and white to them. Scientists want to find out if dogs can see colors. When the scientists give the dogs food, they show them a certain(一定的) color every time. The dogs get ready to eat when they see this color. The scientists then show the dogs another color. Again the dogs get ready to eat. The colors are not all the same to monkeys. For example, if we put food in a red box, and do this every day, a monkey will always go to the red box to get food. If we put food in a blue box, the monkey won't go to eat it.

1. （1） Scientists show the dogs colors ________.

   A . to tell them to eat B . to find out if they can see black and white things C . for fun D . to find out if they can see colors
3. （2） The dogs get ready to eat when they ________.

   A . hear different pieces of music B . see the monkeys C . see black things D . see all the colors
5. （3） Colors are ________.

   A . all the same to monkeys B . not all the same to dogs C . different to dogs D . not all the same to monkeys
7. （4） If we put food in a blue box and do this every day, a monkey will always go to ________.

   A . the blue box to get food B . the blue box and put food in it C . the red box to get food D . the red box and put food in it
9. （5） Which of the following is TRUE?

   A . Scientists find that dogs don't like colors. B . Monkeys will not go to the blue box if we don't show them before. C . Monkeys like the food in the box. D . Dogs like to hear different pieces of music