问题
                    
John’s employer had less and less work for him. John could read the handwriting on the wall and looked for another job.
                            A:喜事
B:坏的征兆
C:墙上的书法
D:令人困惑的事
                        
                        B:坏的征兆
C:墙上的书法
D:令人困惑的事
正确答案是: