Text: what would you say if someone asked you to drink engineering oil?

Correct capitalization: What would you say if someone asked you to drink engineering oil?

Text: yuyuan garden or yu garden shanghai's most famous park, situated in the city's old town, huangpu.

Correct capitalization: Yuyuan Garden or Yu Garden Shanghai's most famous park, situated in the city's old town, Huangpu.

Text: some of the toxins tested and either successfully removed or substantially reduced included benzene, trichloroethytene, and formaldehyde. another interesting fact according to the study is that

Correct capitalization: Some of the toxins tested and either successfully removed or substantially reduced included Benzene, Trichloroethytene, and Formaldehyde. Another interesting fact according to the study is that

Text: if your pc opens the zac file, but it's the wrong application, you'll need to change your windows registry file association settings. in other words, windows is associating zac file extensions with the wrong software program.

Correct capitalization:
If your PC opens the ZAC file, but it's the wrong application, you'll need to change your Windows registry file association settings. In other words, Windows is associating ZAC file extensions with the wrong software program.