问题
选择题
Some people are sitting on the grass; others are walking along the lake, ______ .
A．chatting and to laugh
B．to chat and to laugh
C．chatting and laughing
D．chatted and laughed
答案
答案：C
考查非谓语动词。句意：一些人坐在草地上，其他人在湖边散步，聊天，哈哈大笑。现在分词表示句子主语正在进行的伴随性动作，故选C。