（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.