古诗词默写填空。
      ①无言独上西楼，月如钩。                      。(李煜《相见欢》)
      ②                   ，正是河豚欲上时。（苏轼《惠崇春江晚景》）
      ③《白雪歌送武判官归京》中“                      ，                      ”，比喻新颖传神，是传诵千古的咏雪名句。
      ④王教授已退休多年，仍在勤奋著书。如果要送他一幅书法作品，用曹操的诗句：“                        ，                        ”作为内容就很合适。

foot的复数形式是____。

判断下列说法是否正确。

增加：在缺词处加一个漏字符号（∧），并在此符号下面写出该加的词。

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。

    Last Saturday I went to the Great Wall with some of my friends.In our way up,we saw many volunteers working in the sun.They helped the elders with their bags,took photo for some tourists and answered people's questions.Because they were very tired,they didn't stop to have a rest.Just at the moment,we saw a little boy standing alone,cried.We went over and asked what is the matter.From his answer we knew he couldn't find her mother.We told him not to worry and then we tried to get in the touch with his mother with the phone number he had given us. Twenty minutes late,his mother turned up,and thanked us again and again.That day we enjoyed the beauty of the Great Wall,and felt the warm of the society.If everyone can reach out helping to others,the world will be more harmonious.