Possibly hope in a dire or seemingly hopeless situation.
The Vietcong set up checkpoints around the nation, so that would've definitely been a literal and figurative roadblock to any refugees. Hope this helped.
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The answer is B because the text says "teaching rating is close to zero"
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D) The internet improved communication, but most global transportation still depends on shipping.
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breeze and ease. are the two words that Rhyme