Our eyes are very important to us. They are like cameras. We can ________ with our eyes. But if we don't take care of them, they may get hurt. ________ can we protect our eyes?
On ________ days when the sun shines brightly, we'd better wear sunglasses. When we ________ , 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 ________ .We mustn't play games too long on computers or on mobile phones
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