问题描述：
An old man is his dog the tree tie
英语选择：An old man is ____ his dog ____ the tree
A、tieing to
B、tying with
C、ting to
D、tying to
英语选择：An old man is ____ his dog ____ the tree
A、tieing to
B、tying with
C、ting to
D、tying to
问题解答：
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