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            • 1． If you a____________ yourself to the job in hand, you’ll soon finish it.
              难度：难
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            • 2． _____you start eating in a healthier way，weight control will become much easier．
              A．Unless
              B．Although
              C．Before
              D．Once
              难度：较易
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            • 3． You will never gain success ________ you keep working hard.
              A．when
              B．because
              C．if
              D．unless
              难度：易
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            • 4． _____ the weather is fine tomorrow, we will go fishing.
              A．As well as
              B．As soon as
              C．As long as
              难度：较难
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