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
After 1953 _______ people have succeeded in climbing the mountain.
#14312
A
several hundred of
B
several hundreds
C
several hundreds of
D
several hundred
They ___________ with the aim of becoming number one in the league.
#12533
A
set up
B
set about
C
set out
D
set aside
A new comer ____ to join us in the game tomorrow.
#12961
A
is supposed
B
is supposing
C
supposed
D
supposes