a box:This box has three dimensions: length, width and height.
Its length and width are both 1 centimeter. Its height is 1.5 centimeters.
a grey ball:This ball weighs 1 kilogram or 2.2 pounds.
a moving car:This car's speed is 60 miles per hour or about 97 kilometers an hour.
two moving cars:These two cars are moving in the opposite direction.
The red car is going west and the green car is going east.
two purses:These two purses look the same, but their cost is quite different.
The purse on the left costs $100 more than the purse on the right.
听选：What weighs 2.2 pounds? -This ball weighs 1 kilogram or 2.2 pounds.
听选：How much does the ball weigh? -This ball weighs 1 kilogram or 2.2 pounds.
What is 1cm long and 1.5cm high? -This box is 1 centimeter long and 1.5 centimeters high.
听选：Which way are the two cars going? -They are going in the opposite direction.
How much more does the purse on the left cost? -It costs $100 more than the purse on the right.
These two purses look the same, but their cost is quite different.
How fast is the car going? -This car's speed is 60 miles per hour or about 97 kilometers an hour.
填空：听说：This box has three dimensions: length, width and height.
Its height is 1.5 centimeters.
These two cars are moving in the opposite direction.
填空：This car's speed is 60 miles per hour or about 97 kilometers an hour.
填空：The purse on the left costs $100 more than the purse on the right.
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