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。错误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（∧）。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）不记分。

Dear Smith,

???? I have a good news for you. All senior three students will take part in a mountain- climbing activity in May 18th, which is intending to help reduce our pressure from study. So I’m written to invite you to go along.

???? We plan to gather at the school gate at 8:20, weather permitting. Then they will set off at 8:30, heading for the mountains nearby on feet. After having a good time, we are supposed to go back school for lunch at about 12.

???? The suggestions are as following. You’d better wear strong and comfortably shoes so that you can enjoy the trip. A bottle of water and some snacks are also necessary in climbing. In addition, you can take with you a camera to get some photos take.

???? Looking forward to your reply.

?????????????????????????????????????????????????????????????? Yours,

?????????????????????????????????????????????????????????????? Li Yan.

more than；make sure；pay attention to；in form of...；on doing...；make preparations；donate；graduate from；develop；recent

21.I would achieve higher grades if I________more________________________

the rules and requirements.

22．After______________university，he began to earn his living by editing programmes.

23．Things got so bad________that he decided to go on a diet.

24．With hard work，she________into a great writer.

25．He________thousands of pounds to charity (慈善事业)．

26．The sales manager asked his men to________him________everything about the sales in time.

27．He has never________enough________for his examinations.

28．______________(hear) that familiar song，he couldn’t help dancing to the music.

29．____________one student has bought this book.

30．________________you wear strong shoes when travelling.