The advantage of the latest model will manifest itself in improved efficiency and protection of eye-sight.

A. Dreams show people are working at night.
B. Dreams help people look at daily-life situations and fears.
C. Dreams can help us solve our problems.
D. Dreams allow- us to have different personalities.

A. He isn’t serious about the expedition.
B. It will cost him a lot of money.
C. Other people paid for his airfare.
D. It isn’t fair for him to go alone.