__ may produce a doctor's certificate for air travel when they check in.A．Unaccompanied minorB．VIPsC．Pregnant womenD．The blind passenger
__ may produce a doctor's certificate for air travel when they check in.
A、Unaccompanied minor
B、VIPs
C、Pregnant women
D、The blind passenger
发布时间：2024-12-16 18:19:24
