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Test # 21


1.
We ________ here for ten years now.

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Word of the Day


Idiom of the Day

knock (something) back/down
to drink something (usually alcohol or medicine)
The medicine tasted terrible but I was able to knock it down.

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    The use of an electrically powered oxygen concentratorcite_ref 10cite_ref 10[10] or a chemical reaction based unit can create sufficient oxygen for a patient to use immediately, and these units (especially the electrically powered versions) are in widespread usage for home oxygen therapy and portable personal oxygen, with the advantage of being continuous supply without the need for additional deliveries of bulky cylinders.


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