2851．A large quantity of air conditioners （sell） since the summer came.
今夏以來，已有大量的空調(diào)被銷售出去。

2852．He discovered that in two particular streets the cholera outbreak was so severe that more than 500 people died in ten days.
[句式分析]He discovered that in two particular streets the cholera
                      主句 賓語從句
 outbreak was so severe that more than 500 people died in ten days.
                                                                  結(jié)果狀語從句
[嘗試翻譯]

2853．We all suspect her （be） an actress，but no one knows her.
我們都猜想她是一名演員，但沒有人認識她。

2854．The politician's actions do not consist the promises he made in his speeches.
這個政治家的所作所為與他在演講中的承諾并不一致。

2855．Close the door and windows carefully to prevent some strangers your house.
仔細關好門窗，避免陌生人闖入家中。

2856．He gave his life his country.
他為保衛(wèi)祖國而獻出了生命。

2857．I prefer to get up early rather than go to school without breakfast.
=I would get up early rather than （go） to school without breakfast.
=I would rather （get） up early than go to school without breakfast.
我寧可早起也不愿意不吃早飯去上學。

2858．I think it is .
我認為它是世界上最健康的食物。

2859．After a fire in the lab，a lot of equipment was damaged.
實驗室發(fā)生火災后，很多設備被毀。

2860．As is known to us all，happiness consists health.
眾所周知，幸福在于健康。