| A．How long do you exercise? |
| B．How often do you exercise? |
| C．How often are you exercise? |
| A．Twice a day. | B．Two a day. | C．Two times a day. |
| A．Listen to your mother carefully. |
| B．Listen to our teacher carefully. |
| C．Listen careful. |
| A．Happy birthday to you. |
| B．Good health to you. |
| C．Happy New Year to you. |
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