With more and more farmers moving to cities, an inadequate labor force is ________ becoming a major factor affecting the country's grain output.

Nowadays there are still a number of students        school at various grades due to a lack of money in some poorer areas.

The lion is considered the king of the forest as it is a(n) _____ of courage and power. 

Stop making so much noise        the neighbor will start complaining.

--- What date is it?  --- It’s _____.