ordinary or common?

[Vaok]

Water, which seems so simple and___, is what makes life possible.

A. ordinary B. normal C. usual D. common

What's the difference betwwen ordinary and common? Thanks.

[Alan]

HI,

'Ordinary' suggests that something is not outstanding or unusual. 'Common' gives the idea of something that can be found everywhere.

Alan
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English as a Second Language
You can read my ESL story Saying It Twice