| A.call for an end to use the smartphone while driving |
| B.express concern about the overuse of the smartphone |
| C.appeal to us to pay attention to communication skills |
| D.advise us to be cautious about the addiction to the smartphone |
| A.comparing facts |
| B.listing figures |
| C.giving examples |
| D.analyzing the effects |
| A.parties and gatherings limit their social circle |
| B.people's communication skills are weakened |
| C.people are more and more narrow-minded |
| D.face-to-face communication becomes less important |