请根据以下提示，用英语写一篇关于保护环境，清理废弃物活动的短文。

1．星期天早上我班全体同学7：30在学校大门口集合，骑自行车到动物园。

2．一、二组的同学帮助工人清理废纸、烟蒂、塑料袋等废弃物。三组的同学

设了5个牌子告诫游客保护花草树木，不要践踏草坪。四组的同学们向游

人们讲述了保护环境的重要性。

3．词数：120左右。

下面短文中有10处语言错误，请在有错误的地方增加、删除或修改某个单词。

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)不计分。

例如：It was very nice to get your invitation to spend ∧ weekend with you. Luckily the I was completely free then, so I’ll to say “yes”. I’ll arrive in Bristol at around 8 pm in am　　　　　　　　　　　　　　　　　　　　　　　　　 　　　　　　on Friday.

One day in the restaurant where I worked, I am serving a talbe to four and each person had ordered the different kind of fish. Three plate were already on the table when the man closest to me pointing to one plate and asked me the name of the fish on it. After I could answer him, he continued to ask me the name of the fish on another one plate. I was about to answer him while I noticed that the last plate on my tray(托盘)began to fall. They fell noisily to the floor seconds late, spreading its contents on the carpet. Everyone stared me and I stood there with a red face.

10．As we all know, football is played t　　　　　　 the world.

9．F　　　　　　 is the mother of success.

8．He told her the thing in a low w　　　　　 　.

7．It is known that Abraham Lincoln is an o　　　　　　 leader.

6．Could you　　　　　　 (使快乐)the children for an hour while I make supper.

5．He　　　　　　 (误解)me, I felt unhappy.

4．The boy is　　　　　　 (好奇的)about everything.

3．He is wearing a sad f　　　 　　　expression, go and ask him what is the matter.