问题
选择题
This means going back to the place where we left the family ____ in a tree the night before.
A．to sleep
B．to be sleeping
C．slept
D．sleeping
答案
答案：D
考查非谓语。the family与sleep为主谓关系所以用现在分词作补语。句意：这意味着我们要返回前天晚上这一家睡觉的地方。