For how many hours is the art exhibition open（） A: Eight hours. B: Seven hours. C: Nine hours. D: Ten hours.

How many hours does his father work on Saturdays A: Five hours. B: Six hours. C: Seven hours. D: Two hours.

7. How many hours a day of sleep does the doctor recommend? A: Six or seven hours B: Nine or ten hours. C: Four or five hours.

How many hours on average do Americans read a week according the survey? A: 10.7 hours. B: 4.1 hours. C: 3.1 hours. D: 5.35 hours.

How many hours does the woman work every day except the break A: Seven hours. B: Eight hours. C: Nine hours. D: Six hours.

How many hours can international students work during school breaks? A: Twenty hours B: More than twenty hours. C: Thirty hours. D: Not mentioned

Two hours (be) ____________ a short period of time during the working hours.

3. How many hours of exercise in a week is advised by the speake A: At least two hours. B: At least two and a half hours. C: At least three hours. D: At least three and a half hours.

Questions 4-8 What’s the difference of the time zone between New York and Paris？（） A: Six hours: B: Seven hours. C: Eight hours. D: Nine hours.

_______value all 24 hours of their day as enjoyable and productive hours. A: Workers B: Laborers