【单选题】What is color? Why do some objects look red, others green, others blue? Color is caused by reflected light rays. We see color because objects reflect light. Some thing that is red reflects mostly red ...
【简答题】完形填空 A: Good morning, Lucy. B: 1 morning, Linda. A: What 2 this 3 English? B: It's 3 4 apple. A: What 5 is it? B: It's 6 red. A: What 7 these in English? B: 8 are bananas. A: What color are they? B: ...