The red army men walked from Guizhou to Shanxi to avoid ___ big group of enemies.(敌人)
Li Hong has________the army for 2 years.
—Jenny,I need some milk. —OK,Mum.________do you need?
—How long have you________this book? —For one week.
Two fifths of the rice in our city________from Heilongjiang and Jilin.
There are________students in our school.