2 . 假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有 10处语言错误,每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。
增加:在缺词处加一个漏字符号(Λ)，并在其下面写出该加的词。
删除:把多余的词用斜线(\)划掉。
修改:在错的词下划一横线，并在该词下面写出修改后的词。
注意：1.每处错误及其修改均仅限一词；2.只允许修改10处，多者(从第11处起)不计分。

Wechat is becoming increasing popular with people. Recently I have been made a survey among my classmates about the use of Wechat. According to the result, 65% of the classmates often use it because comparing with other means of communication, Wechat had more advantages. It is cheap, convenient and easily to send all kinds of message around. However, 15% of them are against using it, say it will affect their study. Not using Wechat, the rest have no opinion about them. As far as I'm concerned, since Wechat brings us great convenient, it should be made good use. We shouldn't let it control our minds and behaviors.

3 . After the examination, my teacher told me that failure________the mother of success.

A．was	B．is
C．be	D．been

4 . —When Tom________, please let me know.
—Mary said when Tom________, just tell her about it.

A．comes; comes	B．came; came
C．comes; came	D．comes; coming

5 . Every few years, the coal workers         their lungs X-rayed to ensure their health.

A．are having

B．have

C．have had

D．had had

6 . Professor Williams keeps telling his students that the future ___ to the well-educated.

A．belongs	B．is belonged
C．is belonging	D．will be belonged