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saw,seen,were seen;when,that,who
Flight has been the dream of humankind since birds ________ in the sky.But it wasn't until the 1780s ________ two Frenchmen flew in a hot balloon near Paris.After that,powered flight became the goal.
saw,seen,were seen;when,that,who
Flight has been the dream of humankind since birds ________ in the sky.But it wasn't until the 1780s ________ two Frenchmen flew in a hot balloon near Paris.After that,powered flight became the goal.
were seen;that
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