---Allthestudentsarestudyingquietly. ---Theyhavebeenac...

問題詳情：

 ---All the students are studying quietly.

 ---They have been accustomed ________ any noise during free periods.

  A. not to make                                              B. not to making

  C. to not make                                              D. to not making

【回答】

D

知識點：介詞

題型：選擇題