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單項選擇題

What is the meaning “speed is not of primary importance”? （）

A. Speed is important
B. Speed is not the most important
C. Speed is mainly important
D. Speed is first important

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單項選擇題

What are transported mainly by water? （）

A. Raw materials
B. Heavy, bulky and low value commodities
C. Semi-processed
D. Great amount goods

單項選擇題

How many categories are there in water transport?（）

A. 2
B. 3
C. 4
D. Not available in the paragraph

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