（1）I am not certain whether he will come.
（2）She seemed to have detected some anger in his voice.
（3）Please do not hesitate to call me if I can be of further assistance.
（4）In short , I am going to live there myself.
A. In other words
B. That is to say
C. In a word
D. To be frank
（5）He has trouble understanding that other people judge him by his social skills and conduct.