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        1. Don’t be afraid of asking for help _______ it is needed.
          A.unlessB.though
          C.a(chǎn)lthoughD.when
          D

          試題分析:考查連詞。A. unless除非;B. though盡管;C. although盡管;D. when當(dāng)...時候;此處when相當(dāng)于if,表示條件;句意:如有需要,不要害怕向老師求助。故D正確。
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