Fill in each numbered blank with one suitable word or phrase. Oil (Question 41)____ for almost half of the world’s sea trade. Over land and short distances across the sea, crude oil can (Question 42) ____ transported by pipeline. For long distance transport by sea, (Question 43) _____ ships are used. (Question 44) ____ first, oil was transported in (Question 45) ____ barrels on ordinary cargo ships. Then Marcus Samuel adopted the idea of building ships (Question 46)___ to transport only crude oil and oil (Question 47) ____ which were in effect floating tanks. This was the birth of the oil tanker. The main design feature of (Question 48)____ oil tanker is the division of the oil-carrying space into separate tanks for different types of oil or oil products (Question 49) _____ excessive movement of the liquid at sea. Some of the largest oil tankers in the world can (Question 50) ____ 3 million barrels (126 million gallons) of oil. Question 41:
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