问题
选择题
“ Can you speak English ?”“ Of course , I have studied it ___ I was six years old.”
A. though B. since C. before.
答案
答案：B
though虽然，尽管；since由于，自从……以来；before在……之前。句意：你能说英语吗？——当然了。自从六岁以来我就学习英语。结合语境可知选B.
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