单元检测（二十四） Unexplained Mysteries of the Natural World

　　Ⅰ.语法填空

　　I'd like to say something about WeChat. Nowadays, it __1__ (become) more and more popular in China. No matter where we are, we can send text or voice messages to our friends. We can also find someone __2__ (talk) to by shaking our cellphones. And WeChat can help search for people __3__ (use) this application nearby. Many people like this function (功能), __4__ it can help them make more new friends.

　　All in all, WeChat is really __5__ useful chatting (聊天) tool. It allows us to communicate and share our __6__ (feel) with others more easily. However, it may also do harm to people, especially to students. As you see, some people use WeChat for too long every day, which is of course bad __7__ their health. So it is very important that we use WeChat in a correct way. While studying, we should not use it. And we must be careful not to give away too much __8__ (person) information or trust strangers so much. Or we might be easily cheated online.

　　In a word, we should learn how to use WeChat __9__ (proper). Remember WeChat is not everything in __10__ (you) life.

　　语篇解读：本文为一篇说明文。作为一款功能非常强大的交际应用程序，微信已经被广泛使用。但是，我们应该合理使用它。

　　1．is becoming　根据"nowadays"及"more and more"可知，这里用现在进行时。

　　2．to talk　"to talk to"是动词不定式短语作后置定语，修饰不定代词someone。

　　3．using　people是动词use所表示动作逻辑上的主语，故用现在分词短语作后置定语，修饰people。

　　4．because/for　主句和从句之间在意义上存在因果关系，故用because/for引导原因状语从句。

　　5．a　微信是一个有用的聊天工具，故用不定冠词。

　　6．feelings　形容词性物主代词修饰名词，故填feel的名词形式feeling的复数形式。feeling意为"情感，感情"。

　　7．for　be bad for ...为固定短语，意为"对......有害"。

8．personal　空格中所填单词在句中修饰名词information，故填person的形容词形式。