| A．Her mum and grandma are Chinese . |
| B．His mum and grandma are Chinese . |
| A．Is Line A long than Line B? |
| B．Is Line A longer than Line B? |
| A．I don’t think so . |
| B．I think so . |
| A．That is a good idea! |
| B．That has a good idea! |
| A．What did you do? | B．What happened to your arm? |
| C．What happened of your arm? | D．What are you doing? |
| A．Did you have fun in Beijing? | B．Do you have fun in Beijing? |
| C．What did you do? | D．You’re welcome! |
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