Neither my father nor my brothers ______ the symbol

Nobody knows for sure how dinosaurs died out 65,000,000 years ago. It _______ because of sudden changes of their living conditions.

Don’ put off ________ a travel plan. It’s time for us to start.

My parents insisted that I _____before 23: 00 at night

下列各句中，没有语病的一项是（    ）