【題目】It won't be long _our summer vacation begins, but my vacation plans are still up in the air.

A.whenB.untilC.thatD.before

【答案】D

【解析】

考查狀語從句。句意：要不了多久我們的暑假就要開始了，但是我的假期計(jì)劃還沒有確定下來。A. when當(dāng)……時(shí)候； B. until直到……；C. that那個(gè)；D. before在......之前。結(jié)合上文It won't be long可知此處考查句型it will not be long before+句子，表示“要不了多久就……”，before引導(dǎo)時(shí)間狀語從句。故選D。

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