He had been good terms with Tom, but all of sudden they lost in touch with each other.
A. on ; a
B. in ; /
C. on ; the
D. in ; a
网友回答
(答案→)A. on ; a
B. in ; /
C. on ; the
D. in ; a
解析：考查固定词组。In good terms with sb与某人关系好；all of a sudden突然；句意：他曾经和Tom关系很好。但是突然他们就失去了联系。故A正确。