What's the minimum weight a shipment must reach in order to be transported by air？
A. No restrictions.
B. 68kg.
C. 122kg.
D. 997kg.
The phrase "a leg up" in Paragraph 2 probably means ______.
A. an instinct
B. an advantage
C. a fight
D. a chance
【C3】
A. stable
B. present
C. fixed
D. favorable
【C9】
A. drive
B. reduce
C. return
D. assign
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