What is the main topic discussed in this passage?

(单选题)—How dangerous it was!—Yes, but for the passer-by’s quick ac (单选题)He made a promise ______ he earned money, he would build a n (单选题)British people say “please” and “Thank you” all the time ___ (单选题)______ a child and you will find that he is happy every day (单选题)The proposal ______ at the meeting now is of great importanc (单选题)______ the blueprint into reality will be a new Long March. (单选题)Over the past several decades, governments at all levels ___ (单选题)Sometimes the children just ______ have someone with patienc (单选题)Finding a job in such a big company has always been ______ h (单选题)—Many young people are crazy about the Korean TV series Desc