---We can use QQ to talk with each other on the Internet.
---Really? But can you tell me _______it.
| A．how I can use |
| B．how can I use |
| C．why can I use |
| D．when I can use |
---We can use QQ to talk with each other on the Internet.
---Really? But can you tell me _______it.
| A．how I can use |
| B．how can I use |
| C．why can I use |
| D．when I can use |
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