First, gradually increase a gentle walk to 20 minutes. This can be done every day or _____.
| A．every another day |
| B．every other day |
| C．every other days |
| D．every the other day |
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First, gradually increase a gentle walk to 20 minutes. This can be done every day or _____.
| A．every another day |
| B．every other day |
| C．every other days |
| D．every the other day |
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