How long do you think it will be _____ I can go back to work?
A．beforeB．whenC．untilD．that
A

試題分析：考查連詞，A. before在…之前；B. when當(dāng)…時(shí)候；C. until直到…；D. that指起連接作用，沒有任何意義，句子意思“你認(rèn)為我回去工作需要多長(zhǎng)時(shí)間”
點(diǎn)評(píng)：連詞是個(gè)�？純�(nèi)容，要知道每個(gè)連詞的意思，遇到此類題時(shí)，就很容易做出選擇
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