They ________ extensive and possibly dangerous actual flight training.
A. undertake
B. undergo
C. underplay
D. underuse
They ________ extensive and possibly dangerous actual flight training.
A. undertake
B. undergo
C. underplay
D. underuse
B
句意:他们经历了大量的并且可能是危险的实际飞行训练。
VIP截止日期:2025-01-01 00:05:39
←请使用支付宝扫码支付VIP截止日期:2025-01-01 00:05:39
←请使用微信扫码支付