题目内容：

The students in that class are so naughty.Some teachers find it often hard to keep ___ in class.A.notice B.silence C.order D.line

优质解答

选C,根据上下文进行判断,其实B和C这两个答案似乎都可以,但仔细一想,naughty是淘气,所以是保持秩序,如果是loud（大声）的话,就是要保持安静!