根据内容提示完成句子

The function of the smile is to show happiness and _________(使人放松)．

根据内容提示完成句子

Nobody before Jane fully understood chimp behaviour．She spent years ________(观察并记录)their daily activities．

根据内容提示完成句子

The teacher told us to _________(将难懂的单词划线)and look them up in the dictionary．

根据内容提示完成句子

This character was a little failure but was loved for his optimism and ________(战胜一切困难的决心)．

根据内容提示完成句子

________(这里一定有什么误会)．I don’t know what you’re talking about．

课文填空

Since no one really knows whether GM food is safe, many countries have _________　_________　_________　_________　_________ the production of GM foods, as they would rather be _________ with this new technology．由于没有人确切地知道转基因食品是否安全，许多国家在是否允许生产转基因食品问题上犹豫不决，他们宁愿对这项新技术持谨慎态度。

课文填空

Research has been _________　_________　_________ production _________, rather than _________　_________ that GM foods are safe．GM food could therefore be dangerous．

目前的研究仅局限于增加生产利润，而不是确保转基因食品的安全。因此食用转基因食品可能是危险的。

课文填空

_________　_________, this _________ has been used to produce plants which are better able to _________　_________　_________ pests and disease．

迄今为止，这项技术已经被用来生产能更好地抵御虫害和疾病的植物。

课文填空

However, some people believe that cloning human embryos with the _________ of _________ them _________　_________　_________　_________ human life．

但是，有些人认为怀着摧毁人类胚胎的意图来克隆人类胚胎是对人类生命的不尊重。

课文填空

This project _________　_________ farmers _________ their crops with trees or grass．It has already been a _________ because it has helped improve the local _________ and the land around the river．

这个项目使得农民退耕还林或退耕还草。这个项目已经取得成功，因为它有效地改善了当地的环境和江边的土地情况。