克漏字選擇   Smartphones are attractive in the modern world because of the convenience. 　21　, people are able to share things with others anytime, anywhere 　22　 sending instant messages or visiting social networking websites. Moreover, people can use smartphones to take photos and then upload them to their pages. This shows how much people want to get connected   23   others. However, the overuse of smartphones has led to a serious problem. That is, smartphone users are willing to communicate with people far away 　24　 have a talk with those who are next to them. This can change personal relationships and hurt people’s feelings. So, it’s time for people 　25　 this problem seriously.
【題組】21.( )
(A) Therefore
(B) For instance
(C) As a result
(D) After all