问题
选择题
— ________ you start learning English?
—At the age of five. [ ]
A. When do
B. When did
C. How long do
D. How long did
答案
答案：B
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— ________ you start learning English?
—At the age of five. [ ]
A. When do
B. When did
C. How long do
D. How long did
答案：B