The classroom was silent ( ) the busy scrathing of pens on pa

The classroom was silent ( ) the busy scrathing of pens on paper.
A、besides
B、apart from
C、except for
D、except
【正确答案】：C
【题目解析】：besides 除（包括在内）…, apart from 区别， except for 除了什么在外，except 同类使用去除一部分。句子含义是教室里很安静，除了有笔在试卷上答题声