Almost all English prepositions ______ look like verbs.

A．when they turn into Chinese

B．when turning into Chinese

C．when they turned into Chinese

D．when turned into Chinese

《国家气象灾害应急预案》中指出，气象灾害预警信息发布遵循（）原则。

A.归口管理

B.统一发布

C.科学高效

D.协调有序

E.快速传播