问题
选择题
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
答案
答案：B
题目分析: 句意：他们在网上聊天过得很开心。On the internet,在互联网上，chat聊天，本句为现在分词做定语，故选B。