When it comes to “empty-nest syndrome(综合症)”, parents are advised to _______regular contact with children through phone calls, emails, texts or video chats. 
#12127
A
substitute
B
sacrifice
C
associate
D
maintain
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. The education system was once the ______of the country, but now it seems to be________.
#12956
A
proud…in ruin
B
pride…in ruins
C
remains…falling into ruin
D
wonder…fall into ruins