Li Xiang, a junior 2 student, wishes he never got a mobile phone. Last week, he went to see a doctor because there was something wrong with his arms and fingers. The doctor told him that he had “mobile phone disease(疾病)”. Now, more and more teenagers are getting “mobile phone disease” 78 of using mobile phones.
Li Xiang got his mobile phone six months 79 . He 80 messages to his friends with it all the time, even when going to bed. Li Xiang started to do badly in exams because he spent too much time 81 mobile phone games. His mom felt very 82 about him, but he didn’t stop playing with the mobile phone 83 his arms got injured（受伤）.
Yang Ling, a doctor, says that if someone plays his mobile phone too 84 , like Li Xiang, he will get “mobile phone disease”. If teenagers find their arms or fingers hurt (疼痛), they should go to see a doctor as soon as 85 . Yang says teenagers should try to use their mobile phones less, especially at school.
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解析：
【小题1】本句的含义为越来越多的青少年由于使用手机而患上了手机疾病，表示原因连接短语可用because of，故本题的空格处填because。
【小题2】本句的含义为李翔在6个月之前得到一部手机，表示过去多久以前可用ago，故本题空格处填ago。
【小题3】本句的含义为他总是使用手机给他的朋友发信息，send表示发送的意思，被控表示过去，故空格处填发送的过去式sent。
【小题4】本句的含义为因为他在玩手机游戏上花费太多的时间，spend+时间+doing表示做某事花费多长时间，故本句填玩的动名词playing。
【小题5】孩子玩手机，他的妈妈肯定对孩子非常担心，be worried about表示此意，故本句的空格处填worried。
【小题6】本句的含义为直到他的胳膊受伤了，他才停止玩手机，not……until表示直到……才的意思，故本句空格处填until。
【小题7】本句的含义为如果有人玩手机时间太长，他可能就得了手机疾病，修饰动词表示多可用much，故本句空格处填much/often。
【小题8】如果青少年感到胳膊或手指疼痛，应该尽可能的去看病，as soon as possible表示尽可能的意思，故本句空格处填possible。