When I don't understand the math problem, Tom always helps me with it , he is my walking ________.When I don’t understand the math problem,Tom always helps me with it , he is my walking ________.A. director B dialogue C. dictionary D. duty
问题描述：
When I don't understand the math problem, Tom always helps me with it , he is my walking ________.
When I don’t understand the math problem,
Tom always helps me with it , he is my walking ________.
A. director B dialogue C. dictionary D. duty
答
C.dictionary
walking dictionary 活字典