四、语法填空
阅读下面的短文,在空白处填入一个适当的词,或填入括号中所给单词的正确形式。
Many people use their mobile phones 1 the alarm clocks, and are more used to checking emails before 2 (sleep). Many years ago, my boss stayed up-playing with her mobile phone and got badly ill because of that. Now she always 3 ( leave ) her phone in another room when going to sleep. And she encourages her friends 4 (do) so. "I sent each of my friends 5 same New Year gift—an alarm clock. So they could stop using the phones as the alarm clocks," she said.
6 your mobile phone wakes you up in the morning, it may also keep you up at night. A study shows that people in mobile phone radiation(辐射) mostly have sleeping 7 (problem). And according to a Swedish study, a quarter of young people in this country feel like 8 ( have) their phones near them. Most of them feel sorry for not replying to messages, 9 they even have to reply to their friends before sleeping.
A recent study has shown that three quarters of people aged between 18 and 34 prefer to sleep with their phones near them. That number falls off a little in the middle age, 10 only people aged 65 and older like leaving the phones in another room while sleeping.

1. as 2. sleeping 3. leaves 4. to do 5. the
6. If 7. problems 8. having 9. so 10. but

【分析】
这是一道语法填空题，解题思路为：先通读短文理解主旨（围绕手机对睡眠的影响展开），再逐个分析每个空的考点：结合固定搭配、介词用法、时态主谓一致、冠词规则、从句引导词、名词单复数、连词逻辑等知识点，确定每个空的正确形式。
【解析】
1. 固定搭配use sth as sth（把某物用作……），故填as；
2. before是介词，后接动词-ing形式，故填sleeping；
3. 主语为第三人称单数she，句子是一般现在时，谓语动词用第三人称单数形式，故填leaves；
4. 固定搭配encourage sb to do sth（鼓励某人做某事），故填to do；
5. same前必须加定冠词the，故填the；
6. 此处引导条件状语从句，表“如果”，故填If；
7. problem是可数名词，此处表泛指“睡眠问题”，用复数形式，故填problems；
8. 固定搭配feel like doing sth（想要做某事），故填having；
9. 前后句为因果关系，前因后果，故填so；
10. 前后句为转折关系，故填but。
【答案】
1. as 2. sleeping 3. leaves 4. to do 5. the 6. If 7. problems 8. having 9. so 10. but
【知识点】
固定搭配；一般现在时；冠词用法
【点评】
本题为初中英语常见语法填空题，主要考查基础的固定搭配、时态、冠词及连词逻辑，考点均为学生需掌握的核心基础内容，难度适中，只要熟练积累短语和语法规则即可正确作答。
【难度系数】
0.6