单选题 Meanwhile, I always kept in touch with my former professor at college, by letter and telephone.

A、 kept pace with
B、 kept in contact with
C、 had an idea of
D、 exchanged letters with

【正确答案】 B

【答案解析】题句中的画线短语kept in touch with“与 ……保持联系”，其对应词为kept in contact with(与 ……保持联系)。辨义：A．kept pace with与 ……保持同步；B．kept in contact with与 ……保持联系；C．had an idea of有个想法；D．exchanged letters with交换书信。