When one makes new friends, don't forget
问题:
When one makes new friends, don't forget _____ old ones. [ ]
A. to put up with
B. losing sight of
C. to keep track of
D. keeping in touch with
When one makes new friends, don't forget _____ old ones. [ ]
A. to put up with
B. losing sight of
C. to keep track of
D. keeping in touch with