Alice, you’d better put the vase away ________ it gets broken.
A．whenB．beforeC．unlessD．while
B

試題分析：考查連詞：A. when當(dāng)…時候B. before在…前面C. unless除非D. while當(dāng)…時候，其中before的翻譯比較靈活，可以翻譯成：還沒來得及，句意：愛麗絲，你最好乘還沒有壞把花瓶收好。選B。
點評：此題主要考查連詞的辨析，選擇連詞主要是看前后句的關(guān)系，因果關(guān)系用表因果的連詞，轉(zhuǎn)折關(guān)系用轉(zhuǎn)折連詞，并列關(guān)系用并列連詞，要求考生具有一定的句子分析能力和詞義辨析能力。
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