单项选择题

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单项选择题
If an object weighed one pound on the surface of the earth, how much would it weigh 4,000 miles above the earth
A. 3/4 pounds.
B. 4 pounds.
C. 1/9 pound.
D. 1/4 pounds.
单项选择题
Many business, guests like to eat in their rooms
A. because it is cheaper than in the restaurant.
B. so they can do more work.
C. so they can watch TV while they eat.
D. because they are fired after the long trip.
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