问题补充:
---How long have you been learning Japanese?
---I’ve been learning it .
A. when I was 10 years old
B. since 10 years ago
C. for 10 years old
D. in 10 years
答案:
A. when I was 10 years old
(答案→)B. since 10 years ago
C. for 10 years old
D. in 10 years
解析:考察时态,根据前文我已经学了……现在完成时,能够和since +一段时间 ago或for+一段时间连用,故选B。
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