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Test # 46


1.
Engineers have not yet been able to successfully ________ the power of sunlight for the production of electricity.

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Word of the Day


Idiom of the Day

a stick-in-the-mud
a person who is old-fashioned or does not want to join with others and do something
The girl is a stick-in-the-mud and will never join in any of the activities at a party.

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