My younger sister Duola and I started our first trip. When we got off the plane and arrived at the hotel, we found that our wallet was missing! What should we do? Could our trip be successful?
"Smart Cat" has the following six features: Feature one: original stories, readable. Feature two: audio stories, diverse versions. Feature three: outline closely, high coverage. Feature four: scientific choreography, high repetition rate. Feature five: rich resources both online and offline. Feature six: reading guidance, high practicability.
