Làm và Giải thích nữa 
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Question 17: In a message board you can
messages UI pt
A. raise
D. leave
C. text
services, along with chat rooms, continue to be an important
B. arrive
Question 18: The
part of children's online interactions.
A. online
D. indirect
C. direct
Question 19: Many older people may not understand the
B. offline
of social network in terms of
communication.
A. develop
B. development
C.developed
D. developing
Question 20: Sometimes we don't believe the things he says because he is always
B. making
a joke.
D. speaking
A. talking
C. saying