We often go out to make social investigations.

我们常出去作社会调查。

youdao

Last term, we went to a local paper mill to do some social investigations.

上学期，我们去当地一家造纸厂做社会调查。

youdao

Last term, we went to a local paper mill to do some social investigations.

上学期，我们去当地一家造纸厂做社会调查。

youdao