“No littering” means __________．
| A．We should litter here |
| B．We shouldn’t walk on the grass |
| C．we shouldn’t litter here |
| D．We should talk here |
“No littering” means __________．
| A．We should litter here |
| B．We shouldn’t walk on the grass |
| C．we shouldn’t litter here |
| D．We should talk here |
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