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            • 1．

              I am _____(extreme) sorry for the delay.

              难度：较易
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            • 2．
              64、Our government is making efforts to perfect a market system 　　　　　prices are totally determined by the market.
              难度：难
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            • 3．

              His father died, leaving his family much __________ __________ (穷) than before.

              难度：中等
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            • 4．
              偶尔离开平路，去寻求困境。

              Leave the beaten track ____________ and_________  ___________ the woods.

              难度：较难
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