阅读下面短文，掌握其大意。然后从各题所绘的A、B、C、D四个选项中选出最佳答案。
A
Our eyes are very important to us. They are like cameras. We can 1 with our eyes. But if we don't take care of them, they may get hurt. 2 can we protect our eyes?
On 3 days when the sun shines brightly, we'd better wear sunglasses. When we 4, we shouldn't stay too close to the books and the light shouldn't be too bright or too dark. We shouldn't read in bed. It's bad for our 5. We mustn't play games too long on computers or on mobile phones.
