7．Adjusting to（适应） the tropical heat was more difficult than they had expected．（adjust）

6．-Is Bob still performing？
-I'm afraid not．He is saidto have left（离开）the stage already as he has become an official．（leave）

5．He looks sleepy．He musthave stayed up（熬夜了）last night，writing the essay．（stay）

4．The official song of the 2010 World Cup in South Africa titled Waka Waka features many musical elements thatdate back to/from（追溯到）the ancient times．（date）

3．Expo 2010 Shanghai Chinais being held（在召开）on both banks of the Huangpu River in the city of Shanghai，China，from May 1 to October 31，2010．（hold）

2．Representatives attending Copenhagen Conference recommended thatstrict measures （should） be taken（采取严厉措施） to reduce carbon emission．（take）

1．It is possible that the King of Stonehenge was linked to the stones：hemay have had a hand（很可能参与了） in planning the monument，or in helping transport and pull up the stones．（hand）

20．His younger sister teaches in a secondary school，in front ofwhich flows a small river（流淌着一条小河）．（flow）

19．The more ways we have of looking at a problem，the more likely it is（越有可能）that we can find a solution．（likely）

18．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：在缺词处加一个漏词符号（∧），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的词．
注意：1．每处错误及修改均仅限一词；
2．只允许修改10处，多者（从第11处起）不计分．
It is reported，some needy students receive financial support from some kind people but never express our thanks．Personally，I think they are right．Though the helpers don't expect any reward in turn，but it's necessary and good manner to say"Thank you"．Besides，that is a basic social skill to express ourselves in the modern society．Maybe some of them did feel thankful．It is only because they are afraid of being looked down upon they remain silently．But I just want to say that being poor for the moment doesn't mean you will be poor forever．