A. The production of melatonin in our bodies varies at different time
B. Melatonin is more likely to cause sleepiness in our bodie
C. The reduction of melatonin will cause wakefulness in our bodies,
D. The amount of melatonin remains constant in our bodie
A. Surprised and skeptica
B. Elated and hesitan
C. Relieved and optimisti
D. Optimistic and hesitan

A. A Western love marriage tends to miss some Japanese value
B. Less attention is paid to the partner's qualification in arranged marriage
C. Young Japanese would often calculate their partner's wealt
D. A new arranged marriage is a repetition of the older typ