问题
选择题
I often have conversations with John over ______ telephone, while keep in touch with Tom by ______ letter.
A．不填；the
B．不填；a
C．the；不填
D．the; a
答案
答案：A
选 A。over [on] the telephone 为习语，意为“通过电话”；若用 by telephone 则不用冠词，类似地，by letter（通过信件）也不用冠词。
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