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        1. We will go climbing _______ it ________ tomorrow.
          A.if, rainsB.if, will rainC.unless, rainsD.unless, will rain
          C
          考查條件狀語從句。句意:除非明天下雨,否則我們將會去爬山。故用unless,而unless相當于if…not …. ,從句中的用一般現(xiàn)在時。
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