Crude oil carriers often use （） Big ships。 Huge ships。 Large container ships。 Supertankers。
Water transport is the（） way of shipping bulk and low price goods. Most inexpensive。 Save money。 Low cost。 Economically。
What is the meaning of Metropolitan area? （） Around the city。 City itself。 The area near the city。 Big city and its neighbor area。
The disadvantages of rail compared with motor carrier are（） Cost 。 Speed 。 Lost and damage ratios 。 Transit time and frequency of service。
A （） is a receipt for the goods shipped and a document of title to the goods, the possession of a（） is equivalent in law to possession of the goods. Seaway bill。 Bill of lading。 Letter of credit。 Sales confirmation。
The advantage of rail transport is （）
