搜题
问题   更新时间2023/4/3 12:59:00


17. I often have conversations with John over _____( )____telephone, while keep in touch with Tom by_____( )_____ letter.(本题3.5分)
A、 不填;;the
B、 不填;a
C、 the;不填
D、 the;a

标准答案:C
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