3. Passengers can get a breath-taking view when riding in a cable-car because
A. The car is painted in eye-catching colours.
B. The car is suspended so high in the sky.
C. Each car can seat up to six persons.
D. Both the sky and the sea look beautifully blue.
4. The short trip does not bother passengers who want a good view because
A. the cars move slowly.
B. the cars move quickly.
C. the cars are suspended very high.
D. the cars have glass windows.
5. The last sentence of the passage. “The return journey is no less exciting than the outward trip.” means
A. “The return trip is less boring than the outward one.”
B. “The return trip is more enjoyable than the outward one.”
C. “The return trip is as thrilling as the outward one.”
D. “Both the outward and the return trips are uninteresting.”
Sleep
We all know that the normal human daily cycle of activity is of some 7-8 hour’s sleep alternating with some 16-17 hours' wakefulness and that, broadly speaking, the sleep normally coincides with the hours of darkness. Our present concern is with how easily and to what extent this cycle can be modified.
The question is no mere academic one. The case, for example, with which people can change from working in the day to working at night, is a question of growing importance in industry where automation calls insistently for round-the-clock working of machines. It normally takes from five days to one week for a person to adapt to a reversed routine of sleep and wakefulness, sleeping during the day and working at night. Unfortunately, it is often the case in industry that shifts are changed every week; a person may work from 12 midnight to 8 a. m. one week, 8 am to 4 pm the next, and 4 pm to 12 midnight the third and so on. This means that no sooner has he got used to one routine than he has to change to another, so that much of his time is spent neither working nor sleeping very efficiently.