How many tons does the cargo 737 carry? （） 100 tons。 Not clear。 more than 100 tons。 I don’t know。
Where is the most air freight shipped in the passenger aircraft?（） separately。 Not clear。 In the lower part。 Not mention here。
How much is the percent of air transportation in all modes? （） Less than 1%。 Lowest。 Lower。 Low。
The international trade needs the （） to fulfill its transaction. Great amount of shipped。 Tracks。 Logistics。 Ships。
The international transport and the international logistics are same. Is it correct or not? （） Not mention in the paragraph。 Not clear。 Wrong。 Right。
What is the disadvantage for air transportation? （）
