---Doing sports ___ good for our health.
--- Yes, so I do morning _____ every day.
| A．is, exercise | B．is, exercises |
| C．are, exercise | D．are, exercises |
---Doing sports ___ good for our health.
--- Yes, so I do morning _____ every day.
| A．is, exercise | B．is, exercises |
| C．are, exercise | D．are, exercises |
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