Don't throw litter here!
______．（ ）
| A． |
Yes，please |
B． |
You're welcome |
| C． |
Me，too |
D． |
Sorry，I won't |
Don't throw litter here!
______．（ ）
| A． |
Yes，please |
B． |
You're welcome |
| C． |
Me，too |
D． |
Sorry，I won't |
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