The school recommends parents ________ their children to swim in rivers or lakes during summer holidays.
| A．not permit | B．do not permit |
| C．mustn't permit | D．couldn't permit |
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The school recommends parents ________ their children to swim in rivers or lakes during summer holidays.
| A．not permit | B．do not permit |
| C．mustn't permit | D．couldn't permit |
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