— You speak French so well. How long have you learned it?— I was fifteen.A. UntilB. Since

发布时间：2020-08-22 02:16:16

— You speak French so well. How long have you learned it? 
—      I was fifteen.
A. Until
B. Since
C. When
D. Before

网友回答

A. Until
(答案→)B. Since
C. When
D. Before
解析：since +一般过去时，相当于用延续性动词，how long应该与延续性动词连用，故选答案为B
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