摘要： shells collecting been you have long how
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— How long have you been collecting shells?
— ______.
— ______.
| A．After I left school | B．Before I moved here |
| C．When I went to the beach | D．Since I was ten years old |
--- How long have you been collecting shells?
--- ______.
- A.After I left school
- B.Before I moved here
- C.When I went to the beach
- D.Since I was ten years old
"How long have you been collecting shells?"
"_____."
"_____."
[ ]
A. In three years
B. For three years
C. Since three years
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B. For three years
C. Since three years