题目内容
They realized that some of their prices were higher than their competitors', and revised prices _________.
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He seemed so sure of his decision, how could he flip-flop so ___________ now?
The universe is an __________ vast space filled with planets, stars, systems, nebulae, gas, dust — and it's impossible for us to ever explore it all.
It sounds like a good idea, but I don't think it will work _________.
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