It is a long time _______they separated, but it won’t be long ____ they meet again.
A．since; beforeB．a(chǎn)fter; whenC．since; whenD．a(chǎn)fter; before
A
考查連詞，句意：自從他們分開很長一段時間了，但是不久他們就會在見面的。這是兩個固定句型。It is + 時間段+ since+ 一般過去式，自從什么有一段時間了，it won’t be long before 不久就，所以選A。
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