Before the Wright brothers invented the plane,men ( ) fly.A.could not B.can not

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BeforetheWrightbrothersinventedtheplane,men()fly.A.couldnotB.cannotBeforetheWrightbrothersinventedth

Before the Wright brothers invented the plane,men ( ) fly.A.could not B.can not
Before the Wright brothers invented the plane,men ( ) fly.A.could not B.can not

Before the Wright brothers invented the plane,men ( ) fly.A.could not B.can not
A could not