阅读短文，从方框中选择适当的句子还原到短文中，使短文意思完整． Scientis

题目：

阅读短文，从方框中选择适当的句子还原到短文中，使短文意思完整．

Scientists think that many or most animals can't see colors．小题1: ．To find out if dogs could see colors，scientists gave dogs food every time they played certain piece of music．  小题2: only when they heard this piece of music．They did not get ready to eat when they heard other pieces of music．

Then the scientists gave the dogs food every time they showed them a certain color．The dogs got ready to eat when they saw thi s color． 小题3: ．Again the dogs got ready to eat．The colors were al l the same to them．  小题4: ，however．For example if  we put food in a red box and do this every day．A monkey wiIi always go to the red box to get the food．  小题5: if we then put food in a blue box．