健美操分类按照练习形式可划分为（）、（）、（）。
A. 徒手健美操
B. 持轻器械健美操
C. 专门器械健美操
Usually speaking, when should we get to the airport for the international flight?
A. 3 hours before taking off
B. 2 hours before taking off
C. 1 hours before taking off
D. 40 mins before taking off
All passengers must go through the security gate for check.
A. 对
B. 错
The passengers are not allowed to carry metallic things.
A. 对
B. 错
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