B
With the popularity of smart phones, more and more students are addicted to them. They can't help to pick up the phones on weekends or holidays. Thus, some has become near-sighted, some students can't focus on their study, others have difficulty in sleeping. When they are not allowed to use the phone at home, they may quarrel with parents, even leave home.
Problem: use the smart phones properly
Your advice:

1. Use the smart phone if necessary, such as searching for information for homework.
2. Do some sports instead of staring at the screen which is good for your eyes.
3. Find out something that you are interested in and develop it into your hobby.

【分析】本题要求针对学生沉迷智能手机的问题给出合理使用的建议，需结合学生的学习、生活实际，从减少不必要使用、替代手机的活动、培养兴趣等角度思考，给出具体可行的英语建议。
【解析】首先明确学生沉迷智能手机带来的近视、学习分心、睡眠问题及亲子矛盾等危害，因此建议围绕合理使用、替代不良习惯、培养爱好展开：1.仅在必要时使用手机，比如查找作业相关信息；2.多做运动代替长时间看屏幕，保护视力；3.发掘感兴趣的事物发展为爱好，减少对手机的依赖。
【答案】1. Use the smart phone only when necessary, such as searching for information for homework.
2. Do more sports instead of staring at the screen for a long time, which is good for your eyes.
3. Find out something you are interested in and develop it into your hobby.
【知识点】英语建议表达、合理使用电子产品
【点评】本题贴近学生生活，考查学生运用英语解决实际问题的能力，引导学生树立正确使用智能手机的观念，实用性较强。
【难度系数】0.4