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
推荐题目
 Don’t annoy me again. I must warn you that my patience is almost_______.
#12023
A
in charge
B
in ruins
C
at present
D
at an end
My uncle hasn't been able to quit smoking, but at least he has_____ 
#13858
A
cut out
B
cut down
C
cut up
D
cut off
______ people are standing outside the office. _____ people there is at least over 1,000.
#13404
A
A number of; A number of
B
The number of; The number of
C
A number of; The number of
D
The number of; A number of