He understood his fault and apologized for that.

A. 　腰带

B. 　背带

C. 　安全带

D. 　佩戴

A. 　国家安全

B. 　旅客安全

C. 　飞机安全

D. 　民航安全

A. 　us to meet a few friends 　

B. 　our meeting a few friends

C. 　a few friends to meet

D. 　a few friends meeting

A. 　officer

B. 　teacher

C. 　glasses

D. 　security officer

A. 　对

B. 　错

A. 　对

B. 　错

A. 　对

B. 　错

A. 　cane

B. 　mobile phone

C. 　watch

D. 　weapon

A. 　许可的

B. 　允许

C. 　可容许的

D. 　津贴

A. 　对

B. 　错