"Time is up!" said the teacher. In a moment the students stopped writing and handed in their papers.
    What is the logical relation between the above sentences?
 
【正确答案】 A
【答案解析】 毗邻的两个句子之间的逻辑关系可分为四大类：附加关系、转折关系、因果关系和时间关系。题干中的“In a moment”表明其前后句子之间为时间关系。