问题
选择题
After walking on the zigzag path to the mountain top for a few hours, the tourists gathered under trees ________ shade and ________ down to have a rest.
A．provided; sit
B．providing; sitting
C．providing; sat
D．provided; sat
答案
答案：C
C 考察飞谓语动词和句式分析。And连接gathered和第二空，所以第二空使用sat；第一空是非谓语动词做定语，trees和provide构成主动关系，使用使用现在分词的学生。