Hong long is the Hong Kong-Zhuhai-Macao Bridge totally A: It is 5.5 kilometers long. B: It is 5 kilometers long. C: It is 55 kilometers long. D: It is 50 kilometers long.

What is the land area of China？ A: 9.0 millionsquare kilometers B: 9.4 million square kilometers C: 9.6 million square kilometers D: 9.2 million square kilometers

The city has an area of ________. A: 1580 cubic kilometers B: 1580 square meters C: 1580 square kilometers D: 1580 kilometers

The moon is ______ away from the earth. A: about 384 000 kilometers B: 240 000 kilometers C: only 348 000 kilometers D: about 384 000 meters

The carved by the Colorado River is 1.5 kilometers deep, 320 kilometers long and as much as 29 kilometers wide in some places.（3.0分） A: Great Colorado B: Grand Canyon C: Great Divide D: Grand View

Eight kilometers is roughly ______ five miles.

The speed ___ on this highway is 80 kilometers per hour.

The car is traveling __________ 40 kilometers per hour.

Hong Kong, with an area of 1071.8 square kilometers, is situated _____ the south of the Chinese mainland, neighboring Shenzhen City and 130 kilometers away from Guangzhou City of Guangdong Province.

The teacher told us the light _________________ (travel) at 300,000 kilometers a second.