---Can we swim in the river?
---_______. It's dangerous to swim here.
| A．I'm afraid not. | B．That's OK |
| C．No, not at all. | D．No problem |
---Can we swim in the river?
---_______. It's dangerous to swim here.
| A．I'm afraid not. | B．That's OK |
| C．No, not at all. | D．No problem |
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