Title: Estonian language.
Question: In what Orthagraphy does Modern Estonian orthography have its basis?

Title: Han dynasty.
Question: Whose opinion on the spouse of an arranged marriage was considered to be more important?

Title: Royal Dutch Shell.
Question: Each business now seeks to become what type of unit?

Title: Solar energy.
Question:
The solar water heaters introduced in the US in the 1890s saw growth until what time period?