We conducted a questionnaire survey for the development of new products.

We need to conduct a factual investigation on this issue.

We went to the scene for fact-finding.

The next census will be conducted next year.

When will the next national census be conducted?

According to the latest public opinion poll, it has become clear that many people are in favor of environmental protection.

According to the latest public opinion poll, his approval rating is falling.

The Jinan incident of 1928 was an important event in Chinese history.

The Tax System Investigation Committee is discussing tax reform.

The fact-finding committee submitted a detailed report on this issue.