How many hours is Moscow ahead of London during the summer？A．2B．4C．6

How many hours of sleep does the woman usually get？A．Four.B．Five.C．Eight.D．Ten.

听力原文：W: How many hours does your father work every day？M: Well, he usually works seven

There are 365 days in a year. How many hours are there in a day？

If your vessel bums 8 tons of fuel per hour at 15 knots, how many tons per hour will it bu

How many passengers on an Amtrak train were stuck for nearly 13 hours？A．5.B．30.C．15.D．48.

How many hours do people work a week at present according to the passage？A．10 hours.B．20 h