Edison who invented light had ________

Edison who invented light had _________ knowledge of science.

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I have _____ American friend. He is _______active boy.

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a, an

a, a

an, a

an, an

Shanghai Disneyland will cover _______________ area of 1.5 square kilometres.

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the

Last month I traveled across the Sahara Desert by ______ camel with some locals.What ________ amazing experience!

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There is _______ 11-meter-long bridge over ______ river.

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a; the

the; a

an; an

an; the

This is         apple.

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