6. The researchers asked the strangers to do the following EXCEPT ().
A. telling who looked healthier
B. telling who didn't have many friends
C. telling who missed a lot of sleep
D. telling who was attractive
7. What kind of friend did the strangers like to have? ()
A. The people who were tired.
B. The people who were sleepy.
C. The people who were unhealthy.
D. The people who were attractive and energetic.
8. What does the underlined word "socialize" mean? ()
A. Compare.
B. Play.
C. Communicate.
D. Encourage.
9. According to the passage, which of the following is the best title? ()
A. Beauty Sleep, More Attractive
B. More Sleep, More Friends
C. Less Sleep, Fewer Friends
D. No Attractiveness, No Friends

6 - 9 BDCA