1. (2024七上·榆树期末)  根据短文内容，回答下列问题。

Hello, I'm Gina. Look! What are these? They're the Olympic rings (奥林匹克五环). The colors of the rings are blue, black, red, yellow and green. Our teacher Mr. Green says, "The five colors are for five continents (大洲). " I think it's interesting.

And he tells us another (另一个) interesting thing about colors, too. He says, "You can get new colors with two different colors. " Here is how we can do it.

Yellow + Blue = Green

Red + Yellow = Orange

Blue + Red = Purple

Hi, I'm Eric, a chameleon (变色龙). Nice to meet you! I have many colors. On red apples, I'm red. On purple bags, I'm purple. When I'm in brown boxes, I'm brown. In the evening, you can't find me easily (容易地). Do you know why? Because I'm black in the evening.

1. （1） How many (多少) colors are there in the Olympic rings?
3. （2） Who is Mr. Green?
5. （3） What color can we get with the colors yellow and red?
7. （4） Is Eric purple on purple bags?
9. （5） Why can't we find Eric easily in the evening?