【題目】If you miss this chance, it may be years ____ you get another one.

A. as B. before

C. since D. after

【答案】B

【解析】

試題分析： As 因為了 before之前；since由于；after之后； 句意：如果你錯過這次機會，可能要等幾年的時間才會再有。It be 時間段 before ..表示要。。多么才會。。，故選B項。

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