----Have you got the result?
----No, It will be some time ________we know the result.
A．whenB．sinceC．ifD．before
D
考查連詞before的用法。before作為連詞，意為在什么之前，就，才，還沒來得及，句意：你知道結(jié)果了嗎？不知道，還有一段時間我們才能知道結(jié)果。在這里before是才的意思。所以選D。
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