What is the meaning “cost-effective”? （） cost reduce。 cost increase。 effective。 efficient。
What kind of products do the air carriers deliver? （） The high value。 Low density or weight。 A and B。 To add cost。
（）is the disadvantage for air transportation? Quick but not safe。 Less frequency。 It can’t lift heavy goods。 the highest cost in all transport modes。
What are the advantages for motor transportation? （） Door-to-door service。 Fast。 Flexibility。 A and C。
Container is most benefit for （） Transport, carrying, loading and unloading。 Storage。 Transporting。 Distribution。
Motor transport has the biggest market share in the paragraph. Is it true or not （）
