题文
They had a wonderful time _______________ .
| A．chat on the Internet |
| B．chatting on the Internet |
| C．chat in the Internet |
| D．chatting in the Internet |
They had a wonderful time _______________ .
| A．chat on the Internet |
| B．chatting on the Internet |
| C．chat in the Internet |
| D．chatting in the Internet |
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