阅读理解。 Parents always ask, 'How can I get my child to eat fruits and vegetables?' One answer is to teach your children to fill their bodies with colour.  Fruits and vegetables come in so many beautiful colours. Every different colour is good for us. Orange and yellow fruits and vegetables such as sweet potatoes and oranges are healthy. They have many kinds of vitamins (维生素), such as Vitamins A, B and C.Dark green foods like spinach (菠菜) are very healthy.Red foods like tomatoes and strawberries have Vitamin C.Blue or purple fruits and vegetables such as blueberries and red cabbage are also good for you. What about the colour white? White is not a colour of the rainbow (彩虹) ! White bread is not very healthy,  but whole wheat bread is good for you.  Too much sugar and salt are not good for you.  Of course, some white foods, like milk and tofu are very good for you. Finally, remember the most important thing. Parents need to be good examples. You need to eat a rainbow, too! 1. From the passage we know that _______ are red foods. A. milk and tofu B. spinach and red cabbage C. tomatoes and strawberries D. sweet potatoes and oranges 2. Which of the following foods has no Vitamin C in it? A. Tofu. B. Tomatoes. C. Strawberries. D. Oranges. 3. In the last sentence, 'eat a rainbow' means '_______' A. eat different colours B. eat the seven colours C. eat foods of different colours D. eat the rainbow in the sky 4. The main idea of the passage is _______. A. colour foods have many vitamins B. dark green foods are very healthy C. eating much sugar and salt is not good for you D. eating fruits and vegetables of different colours is good for you