题文
—Are these buses?
—________________.
| A．Yes, these are. |
| B．Yes, they are. |
| C．Yes, they aren’t. |
| D．Yes, these aren’t |
—Are these buses?
—________________.
| A．Yes, these are. |
| B．Yes, they are. |
| C．Yes, they aren’t. |
| D．Yes, these aren’t |
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