China is a country __________ 56 different nationalities, among which Han ________ the majority of its population.
The young nurse was very nervous when she _______in her first operation.
He is _______his job.
--- Have you been buying a lot of new clothes recently? --- _______ .I have been designing my own.
All this snow and ice makes it difficult for old people to ____ very well.
It is suggested that medicine should not be kept where it is ____ to children.