7.In fact, this kind of flowers was intended(intend) for the decoration of the EXPO main conference hall, but later we replaced them with some trees and bushes.

解析：句意：事实上，这种花是计划用来设计装饰世博会主会场大厅的，但后来我们用一些树和灌木取而代之。

8. It was not the passengers but the driver who was to blame(blame) for the accident because the bus picked up too many of them.

9. In our class, about two thirds of the students have passed(pass) the examination by now, which makes us excited.

10.Every means has been tried(try) to improve her spoken English but she feels her teacher is somewhat impatient with her, making her lose confidence in the end.

解析：句意：已尝试了各种方法来提高她的英语口语，但她感觉老师对她有些不耐烦了，这使得她最终失去了信心。