(D) Do not glib. The humorous conversation was a noble upbringing. In appropriate situations, use humor language speech allows people to get rid of binding uneasy feeling, easier and enjoyable. In addition, it combines the multiple roles of the people get aesthetic pleasure, criticism and satire. The humor, however, need to distinguish between place and audience, and the need to take into account their own identity. If everywhere, "he was a silent" quiet, it is possible to "descend" is glib, which lead to customer resentment.