In those days, we had no phones, so we have to keep in touch _____ writing often. A．with B．of C．on D...
2023-01-03 11:25:49 142次 高考英语陷阱题总结归纳介词 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
In those days, we had no phones, so we have
to keep in touch _____ writing often.
本题链接：
