我们正在进行一项调查，以了解顾客对当地公交服务的看法。

We are ___conducting a survey to find out what our customers think of their local bus service.

这些实验是由纽约的科学家进行的。

The experiments were ___conducted by scientists in New York.

这是基于在学校进行的一项问卷调查和我们英语系的调查。

This is based on a questionnaire ___conducted in the school and our English department's investigation.