单选题
[填句补文]The author says that interpersonal relations should be taught as a required course in every school， along with reading， writing， and mathematics. ________. That is at least as important as how much we know.
A.Much of what has been said about strangers also applies to relationships with family members and friends.
B.He keeps looking over the other person‘s shoulder， as if hoping to find someone more interesting in another part of the room.
C.Every time you meet someone in a social situation， give him your undivided attention for four minutes.
D.In his opinion， success in life depends mainly on how we get along with other people.
正确答案：D
答案解析：后句中的代词we在D中才有呼应的代词，而且在文章最后出现观点句是通常论述文的发展特点，因此判断D正确。