【推荐1】After hundreds of failed experiments, they ____________ (偶然发现了治疗方法) for Cholera. (根据汉语提示完成句子)

【推荐2】She discovered the problem ______ ______ (偶然地). (根据汉语提示完成句子)

【推荐3】用适当的短语完成句子
1. —Could you go to the cinema with me
—Sorry, I'll stay up late, ___________(如果有必要), to get the article finished.
2. They built a new lab, which was_____________(以......命名)a scientist.
3. You can easily bored if you do the same work__________(总是).
4. The organizer hoped that the exhibition could___________(引起人们的注意) to the suffering of African children.
5. His story__________(以……为基础) his own experience when he served in the army in the Second World War.
6. He_____________(不习惯) making speeches in public. It's so embarrassing.
7. Their family life_______________(与……相似)ours, and we share the same interests and hobbies.
8. We didn't____________(拥有) the car until a few days after the auction(拍卖会).