问题
选择题
27．At last, the boys found themselves in a pleasant park with trees providing shade and____down to eat their picnic lunch.
A．to sit
B．sat
C．sitting
D．having sat
答案
答案：B
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27．At last, the boys found themselves in a pleasant park with trees providing shade and____down to eat their picnic lunch.
A．to sit
B．sat
C．sitting
D．having sat
答案：B