Since we have met again after all these years let's each other from now on.A. keep up w

问题补充：

Since we have met again after all these years, lets each other from now on.

A. keep up with

B. keep out of

C. keep in touch with

D. keep touching

答案：

A. keep up with

B. keep out of

C. keep in touch with

(答案→)D. keep touching

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