Review of article use - a/an , the or ZERO article

__1__ camera is __x___piece of equipment that is used to take ___x__ photos. ( Choose the correct article for gap 1)

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__X_ camera is __2___piece of equipment that is used to take ___x__ photos. ( Choose the correct article for gap 2)

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__X_ camera is __x___piece of equipment that is used to take ___3__ photos. (Choose the correct article for gap 3.)

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___1___ camera works by allowing light into __x___ hole, which makes ___x__ impression on special paper. (Choose the correct article for gap 1)

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___x___ camera works by allowing light into __2___ hole, which makes ___x__ impression on special paper. (Choose the correct article for gap 2.)

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___x___ camera works by allowing light into __x__ hole, which makes ___3__ impression on special paper. (Choose the correct article for gap 3.)

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This is coated with _1_special chemicals, which catch ___x___ image and preserve it. (Choose the correct article for gap 1.)

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This is coated with _x_special chemicals, which catch ___2___ image and preserve it. (Choose the correct article for gap 2.)

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__1__ original camera was invented in ___x___ eighteenth century and it was black and white (sepia) .... (Choose the correct article for gap 1.)

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__x__ original camera was invented in ___2___ eighteenth century and it was black and white (sepia) .... (Choose the correct article for gap 2.)

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