一、单词拼写。
结合语境，根据汉语提示用单词的适当形式填空。
1. They were afraid to complain about the noise in case they ________ (惹恼) the neighbours.
2. We are ________ (进行) a survey to find out what our customers think of their local bus service.
3. From our point of view, we do not see how these changes will be ________ (有益)to the company.
