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change to 'the' when the object becomes specifi..

The laser is an acronym for Light Amplification by Stimulated Emission of Radiation. The laser has been invented and developed in 1959 and 196..

popular, essential/used, part of, falling, r..

was born, educated, shrewd, diplomat, authored/wrot..

showed/revealed, tendencies, studying, became, suppo..

are allergic, many, causes, allergic, presen..

1) as many as 2) as few as 3) as much as 4) as few as 5) as little as 6) as much as 7) as much population as 8) as many as 9) as little as 10) as little ..

A polygon having eight sides is known as an ______________ => triangle. or quadrilateral. or octagon. or pentagon...

Two line segments with a common end point form a/an ______ . => triangle or point or ray or angle..