Lily’s mobile phone was left in a taxi accidentally, never ______ again.

A．to find

B．to be found

C．finding

D．being found

机械呼吸阀应定期检查和维护，一旦呼吸阀失灵，快速加油很有可能造成油罐的（）事故。

A、胀裂

B、吸瘪

C、倾斜

D、下沉