【单选题】When we see well, we do not think about our eyes very often. (79) It is only when we cannot see perfectly that we realize how important our eyes are. People who are nearsighted can only see things tha...
【单选题】When we see well, we do not think about our eyes very often. (76) It is only when we cannot See perfectly that we realize how important our eyes are. People who are near-sighted can only see things th...