1. (2017七下·浙江期中) 根据所给汉语提示或首字母提示，在空白处写出单词的正确形式 (每空限填一词)。

    Nowadays, you can see many people busy on their smartphones(智能手机) if you look a. Smartphones make our lives easier. But have you ever thought a what they mean to your eyes? Staring(盯) at smartphones for long time gives you dry eyes and even causes a disease (叫做) glaucoma(青光眼).   

    While you're probably not going to stop using your smartphone, there are a few things you can do to protect your eyes. Hold your phone at least 30 cm away from your eyes when using it. Take a break every (小时) and try the following: look at something at least five meters away from you and then focus on the tip of your nose. Repeat this s times. It should reduce(减少) the discomfort in your eyes.