How long do you suppose it is ___________ he arrived there?
A．when B．beforeC．a(chǎn)fterD．since
D

試題分析：考查連詞辨析。A當(dāng)…時；在那時；B在…之前；C在…后；D自從，既然；句意：你認(rèn)為從她到那里到現(xiàn)在有多久了？根據(jù)句意說明D正確。
點評：連詞的詞義辨析要放在上下文的語境中進(jìn)行，要注意上下文的語義的串聯(lián)以及邏輯關(guān)系的推理，特別要注意一些連詞和時間狀語的固定搭配。
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