题目

In order to keep quiet, please go into or out of the library. A. friendly                                        B. quietlyC. comfortably                                 D. beautifully 答案：B。考查词义辨析。由“In order to keep quiet”可知要“悄悄地”进出图书馆。quietly“安静地; 悄悄地”。已知集合，，则＝(  )A．{2，4，6}　B．{1，3，5}　C．{3，5，6}　D．U