[-A72] At the beginning of class ,the noise of desks ______ could be heard outside the classroom.
问题描述：
[-A72] At the beginning of class ,the noise of desks ______ could be heard outside the classroom.
A.opened and closed
B.to be opened and closed
C.being opened and closed
D.to open and close
翻译并分析
答
翻译：课堂开始时,桌子（被）打开和关上的声音在教室外面都能听见.
此题考查后置定语.
1.句中desks为介词of的宾语,而选项为后置定语,修饰desks.
2.如果用不定式做后置定语,一般指不定式所含动词所表示的动作当时尚未发生,即“将要被打开和关上的桌子（的声音）”,明显不通,排除BD；
3.如果用A,即使用过去分词做后置定语,则强调分词所表示的动作在当时已经发生,即“已经被打开和关上的桌子（的声音）”,也不通,排除A.
4.如果使用being done做后置定语,则强调该动作当时正在发生,即“正在被打开和关上的桌子（的声音）”,刚好符合句意,所以C为正确答案.