(1分)We need to get to the roo…——2015 高考英语第 12 题答案解析

2015_天津卷 (英语)

2015 Tianjin Question 12 Single-choice Differentiating
2015_天津卷 (英语)

12. (1分)$We need to get to the root of the problem __________ we can solve it$. (  )

A. while
B. after
C. before
D. as
Answer key

C

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