It is the        in China that people often shake hands when they meet someone for the first time. 

I have to reschedule the appointment with you since there is a ________ in my plan.

Much to my _____, my family were all safe and sound in the fierce flood.

Most members of the committee were in favour of the suggestion; only a ________ were against it.

We could not reason out the way the robbers escaped，because we were unable to find any ________ of them.