A.have poorer academic performances |
B.be more likely to hurt others |
C.enjoy better school lives |
D.are less likely to use alcohol and tobacco |
A.followed a group of students of 6th and 12th grade |
B.found that the students' study skills have connection with their frequency of dating |
C.completed questionnaires about the students' academic efforts |
D.completed a survey and a report each year |
A.They will miss their ex-partners sometimes. |
B.They don't want to see each other any longer. |
C.Their attention to studying will be affected. |
D.They will think it's reasonable to get depressed. |
A.supportive | B.negative |
C.indifferent | D.positive |