3. 【解析】选C。考查强调句型。前句句意: ——就是他常常考试不及格使他父母对他很担心。第一个that引导的是一个主语从句, 第二个that和前面的It is构成强调结构。

　　4. 【解析】选D。句意: 幸亏有网络, 现在我们在家就能获得大量的信息。incredible难以置信的; reasonable合理的; valuable贵重的; accessible可接触到的。

　　5. 【解析】选A。考查固定句式。句意: 汤姆又抱怨了。他一向对食物特别挑剔。It is typical of sb. to do sth. 意思是: 某人一向……。

　　Ⅱ. 1. can’t delay any longer

　　2. benefited from these changes。

　　3. keep in touch with them

　　4. are strongly opposed to

　　5. absorbed in her book

　　Ⅲ.【参考范文】

　　As you know, the 21st century is the century of technology. Nowadays, technology is everywhere around us. And the development of it made cellphones accessible to almost every student who studies at school. They spend most of their time keeping in touch with their friends and playing games, which is consistently opposed by their teachers and parents. So this problem should be solved without delay. No matter what the circumstances, cellphones shouldn’t affect study(Under no circumstances should cellphones affect study).

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